|
Records Committee review for rare bird sighting of Thayer's Gull at Lake Manawa, 1981
|
Administrative records Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1981-12-05
|
1993-08-26
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Lake Manawa in Pottawattamie County, IA on December 5, 1981. Includes a record review document with votes, correspondence and commentary about the sighting, and a documentation form submitted to the committee.
|
Silcock, W. Ross
|
Thayer's Gull
|
Lake Manawa
|
Lake Manawa
|
|
The documentation form by W. Ross Silcock is the only one submitted and forms the basis of this record. | Elimination of similar species: [...] Smaller than adult Herring Gull (winter plumage, red spot end of lower mandible) beside it, legs a little pinker. Larger than Ring-billed Gulls- flock of 14 adjacent. [...] Headmuch [sic] smaller relative to body than in the Herring Gull- also flatter-appearing. [...] 1. Bill was black (or very dark); this , combined with the rather pale underparts relative to the rest of the (also rather pale) plumage tends to rule out a first year Herring Gull. 2. Bill and head size and shape were not as heavy-appearing as in Herring Gull. Direct comparison with adjacent adult Herring Gull was very useful in deciding this. [...] 5. Size and pinker legs than Herring Gull are not sure characters, but lend support to identification as Thayer's Gull.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Iceland Gull at Lock and Dam 15 near Davenport, 1996
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1996-01-05
|
2000-11-22
|
Rare birds documentation form
|
Records Committee review for an Iceland Gull at Lock and Dam 15 near Davenport in Scott County, IA on January 5, 1996. Includes a record review document with votes and two documentation forms submitted to the committee.
|
Fuller, James L
|
Iceland Gull
|
Lock and Dam 15
|
Lock & Dam #15, Davenport (Scott County)
|
|
The documentation form by Jim Fuller forms the basis of this record. Another documentation form by Chris Edwards was submitted. Other observers include Kurt Nelson, Eugene Armstrong, Eloise Armstrong, Pam Allen, and Reid Allen. | Elimination of similar species: Comparisons to Thayer's Gull have been made in the description. First-year Glaucous Gull is larger, and has a two-tone black-tipped bill. | The original documentation form event lasted from 08:45:00/09:20:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Iceland Gull at lake near Des Moines River, 1993
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-04-17
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review for an Iceland Gull at lake near Des Moines River in unknown county, IA on April 17, 1993. Includes a record review document with votes and a documentation form submitted to the committee.
|
Sinclair, Jim
|
Iceland Gull
|
Des Moines River
|
small lake adjacent to D.M. River
|
|
The documentation form by Jim Sinclair is the only one submitted and forms the basis of this record. | Elimination of similar species: Appeared much paler than second year Herring Gull. | The original documentation form event lasted from 11:45:00/11:50:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Iceland Gull at Lake MacBride, 1993
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-04-16
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review of an Iceland Gull at Lake MacBride in Johnson County, IA on April 16, 1993. Includes a record review document with votes and a documentation form submitted to the committee.
|
Fuller, James L
|
Iceland Gull
|
Lake MacBride
|
Short rock jetty from south shore of south arm of Lake MacBride (Johnson County).
|
|
The documentation form by Jim Fuller is the only one submitted and forms the basis of this record. | Elimination of similar species: First year Thayer's Gull is generally darker, with noticably [sic] darker tail and primaries. First year Glaucous Gull is larger with a two-toned bill. | The original documentation form event lasted from 16:39:00/16:42:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Iceland Gull at Centennial Bridge at Davenport, 1993
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-02-07
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review for an Iceland Gull at Centennial Bridge at Davenport in Scott County, IA on February 7, 1993. Includes a record review document with votes and a documentation form submitted to the committee.
|
Fuller, James L
|
Iceland Gull
|
Centennial Bridge
|
Below Centennial Bridge, Mississippi River, Scott County.
|
|
The documentation form by Jim Fuller is the only one submitted and forms the basis of this record. Another observer includes Jim Scheib. | Elimination of similar species: This bird was much too small for a Glaucous Gull, and the generally whiter cast and two-toned bill would suggest a second-winter, compared to first-winter Iceland. | The original documentation form event lasted from 14:55:00/15:00:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Iceland Gull at Lock and Dam 14, 1993
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-01-31
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review for an Iceland Gull at Lock and Dam 14 in Scott County, IA on January 31, 1993. Includes a record review document with votes and a documentation form submitted to the committee.
|
Fuller, James L
|
Iceland Gull
|
Lock and Dam 14
|
Lock & Dam #14, Mississippi River, Scott County.
|
|
The documentation form by Jim Fuller is the only one submitted and forms the basis of this record. | Elimination of similar species: Adult Kumlien's Gull is larger than Ring-billed, and smaller than Herring Gull, both of which have black areas at the end of both upper and underwing. | The original documentation form event lasted from 09:55:00/10:35:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Iceland Gull at Lock and Dam 14, 1993
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-01-31
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review for an Iceland Gull at Lock and Dam 14 in Scott County, IA on January 31, 1993. Includes a record review document with votes and a documentation form submitted to the committee.
|
Fuller, James L
|
Iceland Gull
|
Lock and Dam 14
|
Lock & Dam #14, Mississippi River, Scott County.
|
|
The documentation form by Jim Fuller is the only one submitted and forms the basis of this record. | Elimination of similar species: [...] It was smaller than any of the Herring Gulls, almost totally off white (grayish-brown flecking), dark bill, gray-pink legs. | The original documentation form event lasted from 09:55:00/10:35:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Iceland Gull near Hancher Auditorium in Iowa City, 1993
|
Administrative records Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-01-16
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review for an Iceland Gull near Hancher Auditorium in Iowa City in Johnson County, IA on January 16, 1993. Includes a record review document with votes, a photograph, and three documentation forms submitted to the committee.
|
Fuller, James L
|
Iceland Gull
|
Hancher Auditorium
|
Iowa River near Hancher Auditorium, Iowa City (Johnson County).
|
|
The documentation form by Jim Fuller forms the basis of this record. Other documentation forms by Randall Pinkston and Thomas H. Kent were submitted. Other observers include Carl Bendorf, Jane Fuller, and many unidentified other observers. | Elimination of similar species: First year Thayer's Gull is overall darker, with darker primaries and a well defined dark tail band. Glaucous Gull is larger, and the first year bird has a two-toned bill. | The original documentation form event lasted from 09:35:00/09:45:00 and 12:25:00/12:30:00 on January 16, 1993 and 11:45:00/11:50:00 on January 19, 1993.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Iceland Gull at Red Rock Reservoir Dam, 1991
|
Administrative records Clippings (information artifacts) Correspondence Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1991-03-13
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review for an Iceland Gull at Red Rock Reservoir Dam in Marion County, IA on March 13, 1991. Includes a record review document with votes, seven photographs, an article in Iowa Bird Life, correspondence about bird sighting and review, and eleven documentation forms submitted to the committee.
|
Schantz, Tim
|
Iceland Gull
|
Red Rock Dam
|
Below Red Rock Dam, Marion County, Iowa
|
|
The documentation form by Tim Schantz is the earliest and the one that forms the basis of this record. Other documentation forms by Jim Fuller, Ann Johnson, Thomas H. Kent, Diane Porter, Jim Sinclair, Stephen Dinsmore, James Dinsmore, Beth Proescholdt, and Mark Proescholdt were submitted later. Other observers include Dawn DeVore, Dick Tetrault, Jim Scheib, Beth Brown, Michael Porter, Eugene Armstrong, Eloise Armstrong, and many unidentified observers. | Elimination of similar species: [...] Iowa Birds mentions that there is a problem separating Iceland with Thayers. If there was any problem with this bird being anything it was a Glaucous Gull of the same age. However the bird was smaller than the Herring Gulls that were on the roost. Long wings will rule out the rare small race of Glaucous Gull. There are not to [sic] many birds that have primaries lighter than the mantle in the sitting bird.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Iceland Gull near Le Claire, 1985
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1985-12-27
|
1993-09-03
|
Rare birds documentation form
|
Records Committee review for a Iceland Gull near Le Claire in Scott County, IA on December 27, 1985. Includes a record review document with votes and two documentations submitted to the committee.
|
Brogie, Mark A. Wickham, Peter P.
|
Iceland Gull
|
Le Claire
|
[...] along the Mississippi River approximately one-half mile north of the Interstate 80 bridge in Scott County, Iowa.
|
|
The documentation form by Mark Brogie and Peter P. Wickham forms the basis of this record. Another documentation form by Paul Martsching was submitted. Another observer includes Steve Dinsmore. | Elimination of similar species: [...] The bird was in the company of several Herring Gulls (Larus argentatus) and three subadult Glaucous Gulls (Larus hyperboreus). Two of the Glaucous Gulls were light plumaged birds lacking a gray mantle and, since eye color was not noted, may have been either first or early second winter birds. The third Glaucous was quite buffy and was undoubtably [sic] a first winter bird. The Iceland Gull was first observed being chased by a light-phased Glaucous and was distinctly smaller and lighter colored. It also flew with a faster wingbeat and had a more buoyant flight than that of the larger bird. Glaucous Gulls were also observed chasing Herring Gulls but at no time was intraspecific chasing observed. During several instances two Glaucous Gulls were observed resting on the water or sitting on the ice together, but the Iceland always remained isolated from these birds. At one point the Iceland Gull circled overhead at a distance of approximately 40 yards in the company of a light-phased Glaucous and an immature Herring Gull, and characteristics between the species were well noted. The plumage of the Iceland was wholly white with a faint buffy tinge, yet distinctly whiter than the Glaucous Gull. The size difference between the Glaucous and the other two species was apparent as the Iceland and Herring were of approximately equal size. The head and bill of the Iceland Gull appeared less robust in shape than the Glaucous although both species had a bicolored bill with a flesh colored base and dark tip. [...] The brown barring of the undertail coverts of the Iceland appeared heavier and more noticable [sic] than in its white-winged congeneric counterpart, and contrasted particularly with the whitish tail. | The original documentation form event lasted for approximately twenty minutes.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Thayer's Gull at IPL Ponds in Pottawattamie County, 1989
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-10-29
|
1993-08-06
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at IPL Ponds in Pottawattamie County, IA on October 29, 1989. Includes a record review document with votes and three documentation forms submitted to the committee.
|
Grenon, Alan G.
|
Thayer's Gull
|
MidAmerican Energy Ponds
|
Iowa, Pottawattamie County, south of Council Bluffs, the north pond of the Iowa Power and Light plant's ponds, two miles north of the county line (three miles north of the Bellevue exit on I-29), just east of Interstate highway 29.
|
|
The documentation form by Alan G. Grenon forms the basis of this record. Other documentation forms by Babs Padelford and Ross Silcock were submitted. Other observers include B.J. Rose, Doug Rose, Loren Padelford as well as four unidentified observers. | Elimination of similar species: The most likely similar species are Iceland and Herring Gulls. Iceland Gull (first winter) is eliminated by the combination of the following characters: wing-tip darker than body at rest; wing-tip and secondaries darker above than remainder of wing; tail marked above by a darker band covering most of the distal portion; a possible darker area around the eye. Herring Gull (first winter) is eliminated by the combination of the following characters: wing-tip at rest brown-tan, not black; wing-tip and secondary bar tan in flight, not black; primaries with thin, pale tips; tail bar tan, not black; bill all dark; bill and head delicate; bill thin. Glaucous Gull would have been larger relative to Ring-billed Gulls, with a massive bill light with a dark tip, large head, and wing-tips and secondaries would not have been darker than other upper parts. California Gull (first winter) would have black or near-black primaries, secondaries, tail, and a mostly pale bill with a black tip. Glaucous-winged Gull and hybrids thereof eliminated by bill and head structure and body size all smaller/finer in this bird, tail and wing pattern. AG. | The original documentation form event occurred around 09:30:00 on October 29, 1989, from 11:30:00/12:15:00 and around 14:00:00 on the October 30, 1989.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Cottonwood Recreation Area near Saylorville Dam, 1986
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-12-03
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review of a Thayer's Gull at Cottonwood Recreation Area near Saylorville Dam in Polk County, IA on December 3, 1986. Includes a record review document with votes and a documentation form submitted to the committee.
|
Petersen, Peter C.
|
Thayer's Gull
|
Cottonwood Recreation Area
|
Cottonwood Rec. Area below Saylorville Dam. Polk Co
|
|
The documentation form by Peter C. Petersen is the only one submitted and forms the basis of this record. Other observers include Beth Proescholdt, Mark Proescholdt, Steve Dinsmore, Gil Sandvick, and unidentified other observers. | Elimination of similar species: [...] Birds call not distinguishable from Ring-billed Gulls feeding with it. [...] Herring Gull eliminated by lack of sharp contrast between primaries + remainder of mantle + back and whitish undersides of primaries. | The original documentation form event lasted from 10:02:00/10:03:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of a Thayer's Gull at Red Rock Reservoir Dam, 1985
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1985-12-10
|
1993-09-03
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Red Rock Reservoir Dam in Marion County, IA on December 10, 1985. Includes a record review document with votes, an article in Iowa Bird Life, and six documentation forms submitted to the committee.
|
Bendorf, Carl J.
|
Thayer's Gull
|
Red Rock Dam
|
Red Rock Res. Tailwater
|
|
The documentation form by Carl J. Bendorf forms the basis of this record. Other documentation forms by Thomas H. Kent, Francis L. Moore, Bob Myers, Beth Proescholdt and Mark Proescholdt, and Dennis Thompson were submitted. Other observers include Joe Schaufenbuel, Darwin Koenig, Steve Dinsmore, Eugene Armstrong, Eloise Armstrong, and many unidentified observers. | Elimination of similar species: Thayer's Gull is a difficult bird to identify. In researching this problem, I have found several helpful sources in addition to the standard field guides and I have tried to understand what it takes to know a Thayer's Gull when you see one. Nearly every reference makes it clear that Thayer's cannot be identified on the basis of one or two positive field marks. It takes a combination of characters to come to a conclusion of any certainty. In discussing this particular observation, I will examine each of the fieldmarks and compare and contrast to similar species with liberal reference to the literature, especially Lehman (1980). The most likely similar gulls in this case are 1st winter Herring and 1st winter Iceland (Kumlien's). The Kumlien's form is the darker form of the Iceland Gull and is the form that breeds in the Baffin Island area and winters mainly on the Atlantic coast. Lehman's article deals mainly with Kumlien's. Several similarly sized and possible but unlikely candidates can be eliminated rather quickly. A 1st winter California should not have an all dark bill and would show much darkening in the primaries in flight. Lesser Black-backed Gull could be about the right size, but in flight a 1st winter bird should show darker primary and secondary coverts, more extensively dark primaries, even compared to Herring Gull. A 1st summer Slaty-backed Gull is also light uniform brown with an all dark bill, but it should exhibit extensive darkening in the primaries on the upper wing. A 1st winter Glaucous-winged Gull would be very similar to Thayer's but should be larger, with a larger bill, and less mottling to the body color. Except for the first two, one would probably not consider the likelihood of their occurrence in Iowa to be very great. One hybrid, Glaucous-winged X Western, might be similar but should have a quite heavy bill. [...] Summary: Of the most likely similar species, 1st winter Herring Gull and 1st winter Kumlien's Iceland Gull, each is eliminated by one or more of the features discussed above. The wing pattern is especially damaging to the possibility of Herring, along with the bill shape and size. Iceland is ruled out by the presence of the noticeable tail band and by the darker secondaries on the upper wing. To identify a Thayer's Gull, one must see a combination of field marks. I feel that the bird I saw at Red Rock is consistent on every point.| The original documentation form event lasted from 14:15:00/14:45:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Laughing Gull at IPL ponds, 1989
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-08-27
|
1993-07-21
|
Rare birds documentation form
|
Records Committee review of a Laughing Gull at the IPL Ponds in Pottawattamie County, IA on August 27, 1989. Includes a record review document with votes, an article in Iowa Bird Life, and a documentation form submitted to the committee.
|
Padelford, Babs Padelford, Loren
|
Laughing Gull
|
MidAmerican Energy Ponds
|
Iowa Power & Light Settling Pond, south pond, Pottawattamie Co.
|
|
The documentation form by Babs & Loren Padelford is the only one submitted and forms the basis of this record. | Elimination of similar species: At rest, the bird had a very slender and streamlined appearance, not stocky like that of a Franklin's Gull. The head had no trace of a dark hood. The head was the same color as the rest of the body except for lighter areas around bill, on forehead and top of the head. The bill seemed longer and more curved than a Franklin's, but difficult to say with no Franklin's for comparison. | The original documentation form event lasted from 10:15:00/11:05:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
18
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Lake Manawa, 1981
|
Administrative records Clippings (information artifacts) Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1981-03-19
|
1993-08-26
|
Rare birds documentation form
|
Records Committee review for two Thayer's Gulls at Lake Manawa in Pottawattamie County, IA on March 19, 1981. Includes a record review document with votes, correspondence and comments about the sighting, an article in Iowa Bird Life, and four documentation forms submitted to the committee.
|
Silcock, W. Ross
|
Thayer's Gull
|
Lake Manawa
|
Lake Manawa, Pottawattamie County, Iowa.
|
|
The documentation form by Ross Silcock is the earliest and the one that forms the basis of this record. Other documentation forms by Thomas H. Kent, Peter C. Petersen, and Robert K. Myers were submitted later. Other observers include Tom Shires, James Kovanda, Sandra Kovanda, Tanya Bray, Babs Padelford, Loren Padelford, B.J. Rose, and four unidentified other observers. | Elimination of similar species: The above description separates by direct comparison first-year Thayer's and Herring Gulls, the most similar species present. Thayer's may be confused in first year plumage with Kumlien's form of Iceland Gull, but the Thayer's had primaries slightly darker than the mantle (from above), whereas the opposite occurs in Iceland Gull (Lehman). Lehman also notes that some first-year Western Gulls may show translucent primaries from below in certain light, but these observations took place in excellent light at fairly close range. | The original documentation form event lasted from approximately 09:30:00/11:00:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of California Gull at Saylorville Dam, 1993
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-12-06
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review for a California Gull at Saylorville Dam in Polk County, IA on December 6, 1993. Includes a record review document with votes, an article in Iowa Bird Life, and two documentation forms submitted to the committee.
|
Pinkston, Randall, 1956-
|
California Gull
|
Saylorville Dam
|
Saylorville Reservoir dam, Polk County, Iowa
|
|
The documentation form by Randy Pinkston is the earliest and the one that forms the basis of this record. Another documentation form by Stephen J. Dinsmore was submitted later. Another observer includes Susan Grove. | Elimination of similar species: I am uncomfortable committing to California Gull given the brief and distant view I had, and my limited past experience with the species. My fear is that this was just a small Herring Gull. Herring can be quite variable in overall size, bill size, and in terms of color and shade of the first-winter plumage. Supposedly 10-15% of first-winter Herrings' can have a "dipped-in-ink" bill in the fall (Harrison 1983 or Grant 1986?). | The original documentation form event lasted from 12:30:00/15:30:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
1
|
|
Records Committee review for rare bird sighting of California Gull at Carter Lake, 1993
|
Administrative records Clippings (information artifacts) Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-11-21
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review for a California Gull at Carter Lake in Pottawattamie County, IA on November 21, 1993. Includes a record review document with votes, a photograph, an article in Iowa Bird Life, and three documentation forms submitted to the committee.
|
Bray, Tanya
|
California Gull
|
Carter Lake
|
Carter Lake, Pottawattamie County
|
|
The documentation form by Tanya Bray forms the basis of this record. Other documentation forms by Loren and Babs Padelford, and Ross Silcock were submitted. Other observers include Jerry Toll and B.J. Rose. | Elimination of similar species: Both Ring-billed and Herring Gulls are eliminated by bill coloration, size, slightly darker mantle, and eye color. Western, Lesser-black backed would be darker mantled, different bill coloration. | The original documentation form event lasted from 10:30:00/10:58:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
1
|
|
Records Committee review for rare bird sighting of California Gull at Oak Grove Beach at Saylorville Reservoir, 1990
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1990-09-08
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review for a California Gull at Oak Grove Beach at Saylorville Reservoir in Polk County, IA on September 8, 1990. Includes a record review document with votes and the article California Gull at Saylorville Reservoir in Iowa Bird Life 61:20 by Stephen Dinsmore reviewed by the committee.
|
Dinsmore, Stephen J.
|
California Gull
|
Oak Grove Recreation Area
|
[...] Oak Grove Beach Recreation Area at Saylorville Reservoir, Polk County.
|
|
The article by Stephen J. Dinsmore forms the basis of this record. | Elimination of similar species: [...]The bird was similar in size to the largest Ring-billed Gulls, but slightly larger than others. I approached closer and noted that, when compared to a Ring-billed Gull, the bird had duller yellow legs, a stouter bill with black and red spots near the tip of the lower mandible, and a darker gray mantle. [...] The bird was slightly larger than most of the Ring-billed Gulls, although one or two of the biggest Ring-billed Gulls were as large as the bird I was studying. Proportionately, the bird was heavier and larger-headed than a Ring-billed Gull. [...] I estimated the mantle color to be about midway between those of Ring-billed Gull and a Lesser Black-backed Gull. [...] The bill was heavier than the bill of a Ring-billed Gull and had a distinct gonys. The legs were pale gray-green, unlike the bright yellow legs of a Ring-billed Gull. Leg length appeared similar to a Ring-billed Gull. | The original documentation form event lasted from 07:45:00/09:27:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
1
|
|
Records Committee review for rare bird sighting of Black-headed Gull at Riverton State Wildlife Management Area, 1981
|
Administrative records Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1981-04-26
|
1993-09-01
|
Rare birds documentation form
|
Records Committee review for a Black-headed Gull at Riverton State Wildlife Management Area in Fremont County, IA on April 26, 1981. Includes a record review document with votes, summary of the review, correspondence from Barb Wilson to Tom Kent about the sighting, and four documentation forms submitted to the committee.
|
Bray, Tanya
|
Black-headed Gull
|
Riverton Wildlife Management Area
|
Riverton State Wildlife Management Area Fremont County, Iowa
|
|
The documentation form by Tanya Bray forms the basis of this record. Other documentation forms by Babs Padelford, Loren Padelford, Rick Wright, and W. Ross Silcock were submitted. | Elimination of similar species: Bonoparte's [sic] Gull; The main differences noted were the size and shape of the bill(much longer and heavier than Bonoparte's [sic]) and the style of flight.
|
Iowa Ornithologists' Union | MS 166
|
10
|
21
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Records Committee review for rare bird sighting of Little Gull at Black Hawk Lake, 1996
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Administrative records Clippings (information artifacts) Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1996-04-21
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2000-11-22
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Rare birds documentation form
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Records Committee review for a Little Gull at Black Hawk Lake in Sac County, IA on April 21, 1996. Includes a record review document with votes, an article in Iowa Bird Life, and two documentations submitted to the committee.
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Ernzen, Peter
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Little Gull
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Black Hawk Lake
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[...] south east corner of Blackhawk Lake in Sac Co.
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The documentation by Peter Ernzen forms the basis of this record. A documentation form by Jim Fuller was submitted. | Elimination of similar species: [...] The other five hooded gulls were eliminated for a variety of reasons. Franklin's and Laughing Gull would be larger, darker mantled and have a prominent eye ring. Sabine's Gull would've had a bicolored bill, forked tail and different - white triangular - pattern to its wings. The larger Common Black-headed Gull looks like a larger version of a Bonaparte's Gull with a brownish hood and a red bill. The associated Bonaparte's Gulls were darker mantled and larger. The wings were more angular in appearance with a white leading edge and black wing tips. I have observed all but the Laughing Gull - though the Sabine's Gulls were immature, the distinctive wing pattern is present in both adults and immatures - and feel confident in calling this an adult Little Gull. | The original documentation form event lasted from 10:15:00/10:30:00 and 11:00:00/11:08:00.
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Iowa Ornithologists' Union | MS 166
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10
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20
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Records Committee review for rare bird sighting of California Gull at Red Rock Lake, 1998
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1998-10-05
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2000-11-24
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Rare birds documentation form
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Records Committee review of a California Gull at Red Rock Lake in Marion County, IA on October 5 to November 4, 1998. Includes a record review document with votes and a documentation submitted to the committee.
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Brees, Aaron
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California Gull
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Lake Red Rock
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Red Rock, Marion Co.
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The documentation form by Aaron Brees is the only one submitted and forms the basis of this record. | Elimination of similar species: [...] - larger than Ring-billed Gulls [...] - smaller than Herring Gulls - all first year Herrings have 75-100% dark bills - Herrings are thicker, bulkier - California sits more buoyantly on the water with tail and wingtips sitting much higher off the water
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Iowa Ornithologists' Union | MS 166
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10
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18
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Records Committee review for rare bird sighting of Laughing Gull at Saylorville Dam, 1995
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Administrative records Clippings (information artifacts) Field notes Photographs
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Bird watching Ornithology Ornithology--Societies, etc
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1995-05-11
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2000-11-18
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Rare birds documentation form
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Records Committee review for a Laughing Gull at Saylorville Dam in Polk County, IA on May 11, 1995. Includes a record review document with votes, three photographs, an article in Iowa Bird Life, and two documentation forms submitted to the committee.
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Allen, Pam
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Laughing Gull
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Saylorville Dam
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Polk Co., below Saylorville Dam Spillway
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The documentation form by Pam Allen forms the basis of this record. Another documentation form by Thomas H. Kent was submitted. Other observers include Gordon Brown and Reid Allen. | Elimination of similar species: Franklin's Gull is smaller and has white edges to its wing tips. The black cap does not extend as far down the back of the neck like the Laughing Gull. The call is much different. | The original documentation form event lasted from 07:15:00/07:30:00.
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Iowa Ornithologists' Union | MS 166
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10
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18
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Records Committee review for rare bird sighting of Laughing Gull at Midwest Power Pond, 1994
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Administrative records Correspondence Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1994-10-19
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1996-04-25
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Rare birds documentation form
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Records Committee review for a Laughing Gull at Midwest Power (South) Pond in Pottawattamie County, IA on October 19, 1994. Includes a record review document with votes, a documentation letter from Paul Lehman to Ross Silcock, and two documentation forms submitted to the committee.
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Silcock, W. Ross
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Laughing Gull
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MidAmerican Energy Ponds
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Midwest Power (South) Pond, Pottawattamie Co., IA
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The documentation form by Ross Silcock is the earliest and the one that forms the basis of this record. Other documentations by Babs and Loren Padelford as well as Paul Lehman were submitted later. | Elimination of similar species: [...] Later it was seen at rest with Ring-billed and Franklin's Gulls, the latter group including a few individuals of the same age as the Laughing Gull, allowing careful comparison. [...] The wings were long and pointed, the overall jizz of the bird more attenuated than a Franklin's. [...] There was a grayish-black wash over the crown and nape, slightly intensified in the upper nuchal area, and a paler grayish wash on the flanks in the area below the bend of the wing, imparting a "dirtier" look to the underparts than on same-age Franklin's Gulls (seen when at rest). At rest, the black primaries extended well past the tail, a feature compared easily with nearby Franklin's, and there were no small white crescents in the primaries of the Laughing Gull, a feature easily seen in same-age Franklin's nearby. The Laughing Gull was almost as big as the Ringbills near it, while it appeared significantly larger than the adjacent Franklin's. | The original documentation form event lasted from 11:30:00/11:40:00.
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Iowa Ornithologists' Union | MS 166
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10
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18
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Records Committee review for rare bird sighting of Laughing Gull at Lake Manawa, 1990
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1990-09-09
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1994-11-04
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Rare birds documentation form
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Records Committee review of a Laughing Gull at Lake Manawa in Pottawattamie County in September 9, 1990. Includes a record review document with votes and two documentation forms submitted to the committee.
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Bray, Tanya
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Laughing Gull
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Lake Manawa
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Lake Manawa, Pottawattamie County
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The documentation form by Tanya Bray forms the basis of this record. Another documentation form by Ross Silcock was submitted. Other observers include Babs and Loren Padelford. | Elimination of similar species: This bird differed from Franklin's Gull in the following ways: 1. Less extensive black on head. Eye coverts were not immediately noticable [sic] due to white cheek area. 2. Longer legs, more upright posture, and generally a very long, slender bird. 3. In flight, the bird had long slender wings with completely dark primaries; no white dividing the tips of the outer primaries from the rest of wing, and no white tips to outer primaries. Underside of primaries as described above. 4. Bill was long, curved and slightly swollen and hooked at tip. | The original documentation form event lasted from around 07:35:00/07:36:00, 08:45:00, 12:15:00, and 18:30:00.
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Iowa Ornithologists' Union | MS 166
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10
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18
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Records Committee review for rare bird sighting of Laughing Gull at Oak Grove Beach at Saylorville Reservoir, 1990
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Administrative records Field notes Photographs
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Bird watching Ornithology Ornithology--Societies, etc
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1990-04-13
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1993-07-17
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Rare birds documentation form
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Records Committee review of a Laughing Gull at Oak Grove Beach at Saylorville Reservoir in Polk County, IA on April 13, 1990. Includes a record review document with votes, a photocopy of a photo, and a documentation form submitted to the committee.
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Dinsmore, Stephen J.
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Laughing Gull
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Oak Grove Recreation Area
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Oak Grove Beach, Saylorville Reservoir, Polk Co., IA
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The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. Other observers include Eugene Armstrong and Eloise Armstrong. | Elimination of similar species: On the basis of the dark hood, size, and dark gray mantle, all gulls except for Laughing and Franklin's gulls can be removed from consideration. I will admit that I was skeptical that a Laughing Gull could show up in Iowa on such an early spring date; most interior records are from May-June. But, given the evidence, I am convinced that this bird was indeed a Laughing Gull. The size of this bird, nearly that of a ring-billed gull, favors Laughing Gull. The bill shape and size, length of the legs, wing pattern, and extent of the eye crescents also favor Laughing Gull. An adult Franklin's Gull can be eliminated by the lack of a white bar separating the gray inner wing from the black wingtip. One year-old Franklin's Gulls, however, may show a wing pattern like that of this bird. But, according to Kaufman (1990), such a Franklin's Gull should show some white flecks on the hood, and would be most likely encountered in late spring and summer. | The original documentation form event lasted from 10:48:00/11:34:00 and 12:26:00/13:20:00.
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Iowa Ornithologists' Union | MS 166
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10
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18
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