Documents • Iowa State University • Avian Archives of Iowa Online

Title	Genres	Topics	Date (Start)	Date (End)	Type	Description	Creator/Author	Birds	Locations	Locality	Habitat	Remarks

Rare bird documentation form for Peregrine Falcon at McFarland Park, 1984	Field notes	Birds--Identification Ornithology Rare birds	1984-09-15	N/A	Rare birds documentation form	Rare bird documentation form for a Peregrine Falcon at McFarland Park in Story County, IA on September 15, 1984.	Dinsmore, Stephen J.	Peregrine Falcon	McFarland Lake Park	McFarland Park, Story Co.	flying south with other hawks over woods near a river	The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Hank Zaletel and Erik Munson. \| Elimination of similar species: Merlin was eliminated because of smaller size and lack of black hood. Accipiter sp. eliminated because of wing shape and lack of dark color on head or a hood. Prairie Falcon eliminated because of overall brown rather than black appearance and lack of black hood. \| The original documentation form event occurred at approximately 10:00:00.	Iowa Ornithologists' Union \| MS 166	33	34
Rare bird documentation form for Merlin at Saylorville Reservoir, 1984	Field notes	Birds--Identification Ornithology Rare birds	1984-09-20	N/A	Rare birds documentation form	Rare bird documentation form for a Merlin at Saylorville Reservoir in Polk County, IA on September 20, 1984.	Dinsmore, Stephen J.	Merlin	Saylorville Lake	Saylorville Reservoir, Polk Co.	flying through trees right along edge of water	The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Eric Munson. \| Elimination of similar species: Am. Kestrel was eliminated because of the lack of a rusty back, rusty tail and the unbarred undertail. Peregrine and Prairie Falcons eliminated by larger size and lack of strongly barred tail. Sharp-shinned and Cooper's hawks eliminated by the longer tails, lack of strong barring underneath tail, and by the broader, non-painted wings. \| The original documentation form event occurred around 17:15:00.	Iowa Ornithologists' Union \| MS 166	33	32
Records Committee review for rare bird sighting of Gyrfalcon at Red Rock Reservoir, 1995	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1995-01-02	2000-11-18	Rare birds documentation form	Records Committee review for a Gyrfalcon at Red Rock Reservoir in Marion County, IA on January 2, 1995. Includes a record review document with votes and a documentation form submitted to the committee.	Kenne, Matthew C.	Gyrfalcon	Lake Red Rock	Red Rock Reservoir, Marion Co. above the dam	flyover the ice	The documentation form by Matthew Kenne is the only one submitted and forms the basis of this record. \| Elimination of similar species: The lack of facial pattern and white throat and chest rule out peregrine, as the bird was flying almost directly into the sun (perpendicular to me). It wasn't as pale or brown as a prairie, and with shadow and distance there wasn't any dark/light pattern to the underwing. It wasn't black as a crow + the shape was wrong. Eagles were patterned and obviously larger. \| The original documentation form event occurred around 13:10:00.	Iowa Ornithologists' Union \| MS 166	9	4
Rare bird documentation form for Forster's Tern at Coralville Reservoir, 1983	Field notes	Birds--Identification Ornithology Rare birds	1983-10-21	N/A	Rare birds documentation form	Rare bird documentation form for a Forster's Tern at Coralville Reservoir in Johnson County, IA on October 21, 1983.	Peterjohn, Bruce G.	Forster's Tern	Coralville Lake	Coralville Reservoir, Johnson Co., Iowa	foraging over the open waters of the reservoir	The documentation form by Bruce Peterjohn is the only one submitted and forms the basis of this record. Other observers include Tom Kent, Carl Bendorf, Tom Staudt, and Rick Hollis. \| Elimination of similar species: Common Tern was eliminated by flight pattern (more rapid + deeper wing beats) + apparent head pattern (Common Terns have more extensive black on the head). \| The original documentation form event lasted from around 09:00:00/09:03:00.	Iowa Ornithologists' Union \| MS 166	34	43
Records Committee review for rare bird sighting for Black-billed Magpie at Hitchcock Wildlife Area, 1999.	Administrative records Correspondence Field notes	Bird watching Ornithology Ornithology--Societies, etc	1999-09-27	2000-11-28	Rare birds documentation form	Records Committee review for a Black-billed Magpie at Hitchcock Wildlife Area in Pottawattamie County, IA on September 27, 1999. Includes a record review document with votes, an e-mail from Sue Mattix to Jim Fuller, and a documentation form submitted to the committee.	Mattix, Sue	Black-billed Magpie	Hitchcock Nature Area	Hitchcock Wildlife Area, Crescent, IA	forest	The documentation form by Sue Mattix is the only one submitted and forms the basis of this record. Another observer was Howard Mattix. \| Elimination of similar species: Only similar species would be yellow billed magpie - this one had a black bill \| The original documentation form event lasted from 17:00:00/18:00:00.	Iowa Ornithologists' Union \| MS 166	12	45
Rare bird documentation form for Black-billed Magpie at Hitchcock Wildlife Area near Crescent, 1999	Correspondence Field notes	Birds--Identification Ornithology Rare birds	1999-09-27	1999-10-11	Rare birds documentation form	Rare bird documentation form for a Black-billed Magpie at Hitchcock Wildlife Area near Crescent in Pottawattamie County, IA on September 27, 1999. It is accompanied by an e-mail from Sue Mattix to James Fuller dated September 28, 1999 regarding the bird sighting.	Mattix, Sue	Black-billed Magpie	Hitchcock Nature Area	Hitchcock Wildlife Area, Crescent, IA	forest	The documentation form by Sue Mattix is the only one submitted and forms the basis of this record. Other observers include Howard Mattix. \| Elimination of similar species: Only similar species would be yellow billed magpie - this one had a black bill \| The original documentation form event lasted from 17:00:00/18:00:00.	Iowa Ornithologists' Union \| MS 166	34	83
Records Committee review for rare bird sighting for Bullock's Oriole at Lake Red Rock, 1995	Administrative records Clippings (information artifacts) Field notes	Bird watching Ornithology Ornithology--Societies, etc	1995-09-03	2000-11-20	Rare birds documentation form	Records Committee review for a Bullock's Oriole at Lake Red Rock in Marion County, IA on September 3, 1995. Includes a record review document with votes, an article in Iowa Bird Life, and a documentation form submitted to the committee.	Dinsmore, Stephen J.	Bullock's Oriole	Lake Red Rock	Red Rock Res., Marion Co.	forest along lake	The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. Another observer include Jim Sinclair. \| Elimination of similar species: See above. Baltimore Oriole has a solid black hood and dark wings. \| The original documentation form event lasted from 08:35:00/08:36:00.	Iowa Ornithologists' Union \| MS 166	14	11
Rare bird documentation form for Common Barn Owl at Smith's Slough, 1988	Field notes	Birds--Identification Ornithology Rare birds	1988-10-16	1988-10-18	Rare birds documentation form	Rare bird documentation form for a Common Barn Owl at Smith's Slough in Clay County, IA on October 16, 1988.	Kanago, Dixie	Barn Owl	Smiths Slough	Smith's Slough - clay [sic] County - Dewey Pasture Area	Forest-edge-slough near by lake within 1/4 mi.	The documentation form by Dixie Kanago is the only one submitted and forms the basis of this record. Other observers include Judy Knight, Alice Kehoe, and Wayne Souer. \| Elimination of similar species: [...] An owl - larger than screech - but smaller than gt. horned owl. \| The original documentation form event lasted from 17:30:00/18:00:00.	Iowa Ornithologists' Union \| MS 166	34	48
Rare bird documentation form for Summer Tanager at Nezekaw Point, 1996	Field notes	Birds--Identification Ornithology Rare birds	1996-05-11	1996-05-15	Rare birds documentation form	Rare bird documentation form for a Summer Tanager at Nezekaw Point in Allamakee County, IA on May 11, 1996.	Dankert, Jeffrey B.	Summer Tanager	Nezekaw Point	Allamakee Co. S of Yellow River, along HWY 76, (label on topo map: "Nezekaw Point"	Forest, Upland, Oak-Hickory	The documentation form by Jeff Dankert is the only one submitted and forms the basis of this record. Other observers include Fred Lesher and Brian Collins. \| Elimination of similar species: It lacked the black wings of the scarlet tanager (in any plumage) and also the dark tail of the scarlet. It lacked the wing bars and bill of a female Baltimore Oriole. Its bill and crown were unlike that of a female cardinal. \| The original documentation form event occurred around 13:00:00.	Iowa Ornithologists' Union \| MS 166	35	44
Records Committee review for rare bird sighting for American Swallow-tailed Kite in Hartman Nature Reserve, 1992	Administrative records Field notes Forms (documents)	Bird watching Ornithology Ornithology--Societies, etc	1992-05-12	1994-10-18	Rare birds documentation form	Records Committee review for an American Swallow-tailed Kite in Hartman Nature Reserve in Black Hawk County, IA on May 12, 1992. Includes a record review document with votes and two documentation forms submitted to the committee.	Moye, Kathy A.	Swallow-tailed Kite	Hartman Reserve Nature Center	Over Cedar River between Hartman Nature Reserve and George Wyth Memorial Park	Forested Cedar River Flood Plain	The documentation form by Kathy A. Moye is the earliest and the one that forms the basis of this record. Another documentation form by Francis L. Moore was submitted later. \| Elimination of similar species: Size. Somewhat larger than a Northern Harrier. \| The original documentation form event lasted from 17:00:00/17:05:00.	Iowa Ornithologists' Union \| MS 166	8	24
Rare bird documentation form for Northern Goshawk at Allamakee County, 1982	Field notes	Birds--Identification Ornithology Rare birds	1982-11-21	1982-11-23	Rare birds documentation form	Rare bird documentation form for a Northern Goshawk at Allamakee County, IA on November 21, 1982.	Moore, Francis L.	Northern Goshawk	Allamakee County	N.E. Allamakee County, Iowa	Forested Ridges and bluffs along and to west of upper Mississippi River in Iowa	The documentation form by Francis L. Moore is the only one submitted and forms the basis of this record. Other observers include John Robinson. \| Elimination of similar species: Coopers Hawk would appear more brown on the back and wings with a brownish tinge to the belly. Cooper's Hawk does not have the fluffy white undertail coverts or the white eye stripe as seen on this bird. \| The original documentation form event occurred around 10:00:00/10:01:00.	Iowa Ornithologists' Union \| MS 166	33	25
Rare bird documentation form for Black Duck at Forneys Lake, 1975	Field notes	Birds--Identification Ornithology Rare birds	1975-11-16	1975-12-05	Rare birds documentation form	Rare bird documentation form for a Black Duck at Forneys Lake in Fremont County, IA on November 16, 1975.	Silcock, W. Ross	American Black Duck	Forneys Lake	Forney Lake, Fremont Co., Iowa	Forney Lake is a wetland area and small lake of about 5 acres which attracts numerous waterfowl in spring and fall.	The documentation form by W. Ross Silcock is the only one submitted and forms the basis of this record. \| Elimination of similar species: The only similarly - appearing species remotely possible here would be the Mottled Duck, which I have seen in Louisiana. The Mottled Duck has a much cleaner) cut appearance than the Black Duck and if at all to be expected, would be more likely in the spring. \| The original documentation form event lasted from 10:15:00/10:45:00.	Iowa Ornithologists' Union \| MS 166	33	4
Rare bird documentation form for Ross' Goose at Forneys Lake, 1984	Field notes Forms (documents)	Birds--Identification Ornithology Rare birds	1984-03-25	N/A	Rare birds documentation form	Rare bird documentation form for three Ross' Geese at Forneys Lake in Fremont County, IA on March 25, 1984.	Petersen, Peter C.	Ross' Goose	Forneys Lake	Forney's Lake	Forneys Lake, W. end of lake, away from s. shore	The documentation form by Peter C. Petersen is the only one submitted and forms the basis of this record. Other observers include Paul Johnsgard, Lewis Blevins, Corey Blevins, Brian Blevins, Joe Schaufenbuel, and Stephen Dinsmore. \| Elimination of similar species: Bird 1 much smaller size separates from Snow Geese flying with it. Bird 2 & 3 - small size, bill entirely pink and blue area at base separates from accompanying Snow Geese. \| The original documentation form event occurred around 13:00:00 for first bird and 13:15:00/13:20:00 for 2nd and 3rd birds.	Iowa Ornithologists' Union \| MS 166	32	28
Rare bird documentation form for Yellow Rail at Ames, 1983	Field notes	Birds--Identification Ornithology Rare birds	1983-04-13	N/A	Rare birds documentation form	Rare bird documentation form for a Yellow Rail at Ames in Story County, IA on April 13, 1983.	Dinsmore, Stephen J.	Yellow Rail	Ames	W. Ames, Ia.	found grounded after storm on sheltered side of apt. building - on walk way	The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Kraig Downs, James Dinsmore, and Mark Dinsmore. \| Elimination of similar species: Sora - no white wing patch and larger in size. Virginia Rail - longer bill and darker color. \| The original documentation form event lasted from 06:00:00/06:30:00.	Iowa Ornithologists' Union \| MS 166	33	39
Rare bird documentation form for Greater Scaup at Coralville Reservoir, 1977	Field notes	Birds--Identification Ornithology Rare birds	1977-03-22	N/A	Rare birds documentation form	Rare bird documentation form for a Greater Scaup at Coralville Reservoir in Johnson County, IA on March 22, 1977.	Halmi, Nicholas S.	Greater Scaup	Coralville Lake	Coralville Reservoir, Johnson Co., about 1/2 mile above dam	fresg\h water - reservoir lake	The documentation form by Nicholas S. Halmi is the only one submitted and forms the basis of this record. \| Elimination of similar species: Lesser Scaups (several in same scope field): contrast in head shape, bill size, neck thickness clear; some of Lesser Scaups in vicinity had grayish smudged flanks rather than pure white of Greater Scaup. \| The original documentation form event lasted from 16:20:00/16:35:00.	Iowa Ornithologists' Union \| MS 166	33	10
Rare bird documentation form for Western Grebe at Ruthven, 1979	Field notes Forms (documents)	Ornithology Rare birds	1979-06-15	1979-06-18	Rare birds documentation form	Rare bird documentation for a Western Grebe at Ruthven at Palo Alto County, IA on June 15, 1979.	Dinsmore, James J.	Western Grebe	Mud Lake	Mud Lake, 4 mi. N of Ruthven, Iowa	fresh water lake in open water	The documentation form by James Dinsmore is the only one submitted and forms the basis of this record. Other observers include Steve and Mark Dinsmore. \| Elimination of similar species: Common Loon. This bird was no big enough, neck was too long and bill too thin for winter plumage loon. \| The original documentation form event lasted from 15:00:00/15:30:00.	Iowa Ornithologists' Union \| MS 166	32	15
Rare bird documentation form for Surf Scoter at Little Wall Lake, 1978	Field notes	Birds--Identification Ornithology Rare birds	1978-11-18	1978-11-21	Rare birds documentation form	Rare bird documentation form for a Surf Scoter at Little Wall Lake in Hamilton County, IA on November 18, 1978.	Dinsmore, James J.	Surf Scoter	Little Wall Lake	Little Wall Lake, Hamilton County, Iowa	fresh water lake, open water near center of lake	The documentation form by James Dinsmore is the only one submitted and forms the basis of this record. Other observers include Mark and Steve Dinsmore. \| Elimination of similar species: Most ducks - general dark color and the heavy bill. White-winged Scoter-no white on wing. Black Scoter-head not 'two-toned' (dark above, light below). \| The original documentation form event lasted from 11:00:00/11:15:00.	Iowa Ornithologists' Union \| MS 166	33	11
Rare bird documentation form for Red-throated Loon at Saylorville Reservoir, 1999	Field notes	Birds--Identification Ornithology Rare birds	1999-11-07	N/A	Rare birds documentation form	Rare bird documentation form for two Red-throated Loons at Saylorville Reservoir in Polk County, IA on November 7, 1999.	Dinsmore, James J.	Red-throated Loon	Saylorville Dam	Saylorville Reservoir, off of west end of dam	freshwater lake	The documentation form by Jim Dinsmore is the only one submitted and forms the basis of this record. Other observers include Bery Engebretsen and Dennis Thompson. \| Elimination of similar species: I spent a long time puzzling over these birds, both in the field and later when I had several references to consult. None of the guides I looked at showed a bird that looked like these. Common (a small one): removed on the basis of size (birds too small for Common Loon), the thinner and bicolored bill, and the color pattern on the neck. At this time of year, all of the Common Loons I have seen (and saw on Saylorville that day) were distinctly white on the front of the neck with some partial bands of brown extending back in to the white. Pacific Loon: Eliminated on behavior (head posture), lack of a distinct dark/white line along the side of the neck, lack of chin straps across neck, and presence of brown on front of neck. Also the gray/brown contrast between neck and back would point away from Pacific but not eliminate it. Red-throated Loon: This is what I first thought the birds were but as I viewed them, I convinced myself several times that they were Pacific Loons. However, the combination of characters listed above seem to eliminate the other two possible species and also are positive characters for the Red-throated Loon. One character that puzzled me was the size of the bill. At least some of the guides (Advanced Birding esp) show the Red-throated Loon as having a tiny bill, much smaller than on this bird but those illustrations do not match those in other guides which emphasize more the shape of the bill than the size. \| The original documentation form event lasted from 07:45:00/08:45:00.	Iowa Ornithologists' Union \| MS 166	32	8
Records Committee review for rare bird sighting of Brant at Whitebreast Park, 1987	Administrative records Clippings (information artifacts) Field notes	Bird watching Ornithology Ornithology--Societies, etc	1987-10-04	1993-09-07	Rare birds documentation form	Records Committee review of a Brant at near Whitebreast Park in Marion County, IA on October 4, 1987. Includes a record review document with votes, an article in Iowa Bird Life and a documentation form submitted to the committee.	Dinsmore, James J.	Brant	Whitebreast Recreation Area	released at Polk City Wildlife Area; bird had been caught on south shore of Red Rock Reservoir, Marion County	freshwater lake	The documentation form by Jim Dinsmore is the earliest and the one that forms the basis of this record. Other observers include Jennifer Lancaster, Tom Miller, Steve Dinsmore, and Roger Sedlacek. \| Elimination of similar species: Canada Goose-small size eliminates all but the smallest races; the bird lacked a cheek patch. \| The original documentation form event lasted from 11:00:00/08:00:00 next day when they released the bird.	Iowa Ornithologists' Union \| MS 166	8	9
Records Committee review for rare bird sighting of Magnificent Frigatebird at Red Rock Reservoir, 1988	Administrative records Clippings (information artifacts) Field notes	Bird watching Ornithology Ornithology--Societies, etc Wildlife conservation	1988-10-02	1993-08-04	Rare birds documentation form	Record Committee review of a Magnificent Frigatebird at Red Rock Reservoir in Marion County on October 2, 1988. Includes a record review document with votes, an article from Iowa Bird Life, an introductory letter from Ann Johnson, and a documentation form submitted to the committee.	DeVore, Dawn L.	Magnificent Frigatebird	Lake Red Rock	Behind Visitor Center at Lake Red Rock, Marion Co., IA	Freshwater lake shore	The documentation form by Dawn L. DeVore is the earliest and the one that forms the basis of this record. \| Elimination of similar species: After getting the bird book, I took my knowledge of the birds in the area and my mental picture and went to work. I ruled out the turkey vulture because the bird was too streamlined like a tern. I looked at the terns, soon realizing that there were no almost completely black terns. Thus I turned to the gulls. I knew it had to be a water area type bird because of its body and bill shape. Remembering the bill I quickly ruled out the gulls. Thus I turned to the cormorants but the tail was wrong, the neck was too long and more so the cormorant was out of the picture. Thinking I recalled hearing about a sighting of a rare bird in Iowa, only the night before had I looked at an outline of its body shape. Bingo! That was it! The shapes matched but what was the name? I went through the bird section page by page. Then there it was - the Magnificent Frigatebird. This was it; almost all black, large yet streamlined, "forked" or V shaped "tail", and that unique bill. Then the fact that the bird I saw had no red and two side by side white breast areas confirmed that it was a female Magnificent Frigatebird. \| The original documentation form event lasted from 12:45:00/12:50:00.	Iowa Ornithologists' Union \| MS 166	7	15
Rare bird documentation form for Great-tailed Grackle at Finn Pond in Greene County, 1984	Field notes	Birds--Identification Birds--Nests Ornithology Rare birds	1984-05-31	1984-06-04	Rare birds documentation form	Rare bird documentation form for six Great-tailed Grackles at Finn Pond in Greene County, IA on May 31, 1984.	Dinsmore, James J.	Great-tailed Grackle	Finn Pond Wildlife Area	Finn Pond (2 miles west of Jefferson, Greene Co)	freshwater marsh	The documentation form by Jim Dinsmore is the only one submitted and forms the basis of this record. Other observers include Mike Brown. \| Elimination of similar species: Common Grackle-size Boat-tailed Grackle- range and eye color \| The original documentation form event lasted from 08:15:00/08:30:00.	Iowa Ornithologists' Union \| MS 166	35	77
Rare bird documentation form for Cinnamon Teal at Anderson Lake, 1986	Field notes	Birds--Identification Ornithology Rare birds	1986-03-31	1986-04-02	Rare birds documentation form	Rare bird documentation form for a Cinnamon Teal at Anderson Lake in Hamilton County, IA on March 31, 1986.	Dinsmore, James J.	Cinnamon Teal	Anderson Goose Lake	Anderson Lake, Hamilton County	freshwater marsh	The documentation form by Jim Dinsmore is the only one submitted and forms the basis of this record. Other observers include Steve Dinsmore and Jack Holloway. \| Elimination of similar species: nothing else shows this color pattern that I am aware of. \| The original documentation form event occurred around 11:00:00.	Iowa Ornithologists' Union \| MS 166	33	6
Records Committee review for rare bird sighting of Black-bellied Whistling-Duck at Big Marsh, 1993	Administrative records Clippings (information artifacts) Correspondence Field notes Photographs	Bird watching Ornithology Ornithology--Societies, etc	1993-11-01	1996-04-25	Rare birds documentation form	Records Committee review of a Black-bellied Whistling-Duck at Big Marsh in Butler County, IA on November 1, 1993. Includes a record review document with votes, correspondence about the bird sighting, two photographs, an article in The Southwestern Naturalist, and a documentation form submitted to the committee.	Dinsmore, James J.	Black-bellied Whistling-Duck	Big Marsh Wildlife Area	Big Marsh	freshwater marsh	The documentation form by Jim Dinsmore is the only one submitted and forms the basis of this record. Other observers include Rodney Steere. \| Elimination of similar species: Nothing it could be confused with	Iowa Ornithologists' Union \| MS 166	8	3
Rare bird documentation form for Thayer's Gull at Cone Marsh, 1983	Field notes	Birds--Identification Ornithology Rare birds	1983-02-27	N/A	Rare birds documentation form	Rare bird documentation form for a Thayer's Gull at Cone Marsh in Louisa County, IA on February 27, 1983.	Newlon, Michael C.	Thayer's Gull	Cone Marsh Wildlife Management Area	NE side Cone Marsh Louisa Co IA	freshwater marsh with considerable open water	The documentation form by Michael Newlon is the only one submitted and forms the basis of this record. Other observers include Carol S. Newlon. \| Elimination of similar species: proportions, uniformly pale primaries would rule out herring; size/build rules out imm. glaucous. Bill much less heavy than imm. glaucous-winged. Remaining question is whether this bird is (over) a Thayer's Gull or a Kumlien's gull, presently considered separate species but widely suspected of being conspecific. Thayer's is extremely variable, and the limits of its variability are not well known, especially for imm. plumages. [Dwight says of his series of ad. thayeri, 'no two are alike'. It seems probable that there is clinal variation from west to east (thayeri - kumliesi [sic] - nominate glaucoides) and even possible that thayeri interbreeds with argenlatus at the western end of its range.] In addition several plumage descriptions in the literature may be assigned to birds of [illegible] age. Be that as it may: L. glaucoides glaucoides is supposed to have pale warm-brown primaries as a 1-W & paler, nearly whitish areas as a 2-W (though photos in grant's [sic] book show one 2-W with pale-brown primaries concolor with coverts). L. glaucoides kumlieni (in Dwight's plates) is assigned v. pale primaries as a 1-W, with slightly darker outer webs; would look uniform pale grey at any distance. His 2-W has darker primaries, again with slightly darker outer webs [I suspect these assignments should be reversed.] L. thayeri in published description is supposed to have darker primaries still, though not so dark as those of imm. Herring gulls, and lacking contrast with mantle. However some west coast thayeri-type gulls are very pale - though their back color is grey-brown rather than the warmer pale tan of L. glaucoides. (It is possible that these are really kumlieni but little data exists.) It is the similarity of the Cone Marsh Bird to one I photographed in Cal. that convinced me to classify it as thayeri - though kumleni cannot be unequivocally ruled out \| The original documentation form event lasted from 11:10:00/12:30:00.	Iowa Ornithologists' Union \| MS 166	34	35
Rare bird documentation form for Northern Goshawk at Sweet Marsh, 1984	Field notes	Birds--Identification Ornithology--Societies, etc Rare birds	1984-02-15	1984-02-16	Rare birds documentation form	Rare bird documentation form for a Northern Goshawk at Sweet Marsh in Bremer County, IA on February 15, 1984.	Proescholdt, Beth	Northern Goshawk	Sweet Marsh	northeast Bremer Co, road just east of Sweet Marsh	from trees along marsh, over farmland	The documentation form by Beth Proescholdt is the only one submitted and forms the basis of this record. Other observers include Mark Proescholdt and Bob Myers. \| Elimination of similar species: Cooper's Hawk - too large for that; other hawk (buteos or harrier) - not that because of accipiter shape + flight. \| The original documentation form event lasted from 13:08:00/13:12:00.	Iowa Ornithologists' Union \| MS 166	33	25