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

Records Committee review for rare bird sighting of Red-throated Loon at Saylorville Reservoir, 1995	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1995-11-29	2000-11-20	Rare birds documentation form	Records Committee review for a Red-throated Loon at Saylorville Reservoir in Polk County, IA on October 29, 1995. Includes a record review document and a documentation form submitted to the committee.	Dinsmore, Stephen J.	Red-throated Loon	Saylorville Lake	Saylorville Res., Polk Co.	large lake	The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. Other observers include Dennis "Denny" Thompson. \| Elimination of similar species: The smaller size, slimmer appearances, and bill size and shape eliminate other loon species, especially Pacific and Common. \| The original documentation form event lasted from 15:55:00/16:50:00.	Iowa Ornithologists' Union \| MS 166	7	5
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 Thayer's Gull at Red Rock Dam, 1993	Field notes	Birds--Identification Ornithology Rare birds	1993-12-24	N/A	Rare birds documentation form	Rare bird documentation form for a Thayer's Gull at Red Rock Dam in Marion County, IA on December 24, 1993.	Johnson, Ann	Thayer's Gull	Red Rock Dam	Below Red Rock Dam, Marion County, Iowa	Open river with gravel bars	The documentation form by Ann Johnson is the only one submitted and forms the basis of this record. Other observers include Raymond Cummins. \| Elimination of similar species: Dark eye and head/bill structure eliminated Herring Gull. \| The original documentation form event lasted from 11:20:00/11:30:00.	Iowa Ornithologists' Union \| MS 166	34	35
Rare bird documentation form for Thayer's Gull at Redrock Dam, 1993	Field notes	Birds--Identification Ornithology Rare birds	1993-12-24	1994-01-14	Rare birds documentation form	Rare bird documentation form for a Thayer's Gull at Redrock Dam in Marion County, IA on December 24, 1993.	Cummins, Raymond L.	Thayer's Gull	Red Rock Dam	Lake Redrock below dam, Marion Co.	Open water below spillway.	The documentation form by Ray Cummins is the only one submitted and forms the basis of this record. Other observers include Ann Johnson. \| Elimination of similar species: see above. [...] I picked this bird out because of it's small size compared to the other Herring Gulls present (40). It was smaller than any of the Herring gulls present, but still much larger than any of the numerous Ring-billed gulls. The head appeared more rounded than the Herring gulls and the heavy brown streaking on the nape and neck was more extensive and darker than any Herring present. The bill w/a red gonys mark on the lower mandible was shorter and thinner w/less gonys than the Herrings. They eye iris was dark not yellowish as in all the Herrings present. \| The original documentation form event lasted from 10:00:00/10:35:00.	Iowa Ornithologists' Union \| MS 166	34	35
Rare bird documentation form for Thayer's Gull southeast of Jolly Roger Marina at Coralville Reservoir, 1993	Field notes	Birds--Identification Ornithology Rare birds	1993-12-19	N/A	Rare birds documentation form	Rare bird documentation form for a Thayer's Gull southeast of Jolly Roger Marina at Coralville Reservoir in Johnson County, IA on December 19, 1993.	Pinkston, Randall, 1956-	Thayer's Gull	Jolly Rogers Campground	Coralville Reservoir (1/4 - 1/2 mile southeast of Jolly Roger Marina), Johnson County, Iowa		The documentation form by Randall Pinkston is the only one submitted and forms the basis of this record. \| Elimination of similar species: Contrasted with first-winter Herring Gull above. First-winter Iceland typically much paler, especially the uppersurface of the primaries which are paler than the rest of the mantle, and Iceland should show mottling in the tertials and tail band. I suppose I cannot exclude a heavily-pigmented 'Kumlien's' Gull or an Iceland-Thayer's intergrade as described in Kevin Zimmer's Birding article. Both species are apparently highly variable. \| The original documentation form event lasted from 10:45:00/11:15:00.	Iowa Ornithologists' Union \| MS 166	34	35
Rare bird documentation form for Thayer's Gull at Red Rock Dam, 1993	Field notes	Birds--Identification Ornithology Rare birds	1993-11-13	N/A	Rare birds documentation form	Rare bird documentation form for a Thayer's Gull at Red Rock Dam in Marion County, IA on November 13, 1993.	Pinkston, Randall, 1956-	Thayer's Gull	Red Rock Dam	Lake Red Rock dam, Marion County, Iowa		The documentation form by Randall Pinkston is the only one submitted and forms the basis of this record. Other observers include Jim Fuller. \| Elimination of similar species: Compared with first-winter Herring Gull above. Pale Thayer's may be confused with same-aged Iceland Gull, but Iceland typically much paler than this individual. Iceland should also show pale, mottled tertials and tail which are concolor with the upperparts. This bird's tertials and tail were unpatterned (except at the edges of the tertials) and darker than the remainder of the upperparts. Iceland's folded primaries are paler than the remainder of the mantle, not darker as in this bird. Slaty-backed, Glaucous-winged, and Glaucous-winged X Western hybrid Gulls all larger, have more massive bills, less likely in Iowa. \| The original documentation form event lasted from 10:15:00/10:40:00.	Iowa Ornithologists' Union \| MS 166	34	35
Documentation of an extraordinary bird sighting, Thayer's Gull, November 13, 1993	Field notes	Birds--Identification Ornithology Rare birds	1993-11-13	1993-11-27	Manuscript, graphic, and printed material	Documentation supporting the sighting of a Thayer's Gull at Red Rock Reservoir in Marion County, IA contributed by Thomas H. Kent on November 13, 1993.	Kent, Thomas H. (Thomas Hugh), 1934-	Thayer's Gull	Lake Red Rock				Iowa Ornithologists' Union \| MS 166	34	35
Rare bird documentation form for Thayer's Gull at Red Rock Reservoir, 1993	Field notes	Birds--Identification Ornithology Rare birds	1993-11-13	1993-11-16	Rare birds documentation form	Rare bird documentation form for a Thayer's Gull at Red Rock Reservoir in Marion County, IA on November 13, 1993.	Cecil, Robert I.	Thayer's Gull	Lake Red Rock	Tailwaters, Red Rock Res.	Tailwaters/River	The documentation form by Bob Cecil is the only one submitted and forms the basis of this record. Other observers include Tom Kent and Dick Tetrault. \| Elimination of similar species: 1st winter Herring Gull has a very dark secondary bar, often has lighter head, and generally has a much more 'contrastry' appearance involving darker and lighter shades of brown. Overall, the 1st winter Herring is darker brown. \| The original documentation form event occurred in the afternoon.	Iowa Ornithologists' Union \| MS 166	34	35
Rare bird documentation form for Thayer's Gull at Iowa City, 1993	Field notes	Birds--Identification Ornithology Rare birds	1993-01-19	N/A	Rare birds documentation form	Rare bird documentation form for a Thayer's Gull at Iowa City in Johnson County, IA on January 19, 1993.	Kent, Thomas H. (Thomas Hugh), 1934-	Thayer's Gull	Iowa City	Iowa City, Johnson Co., Iowa.	partially open Iowa River	The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Jim Fuller. \| Elimination of similar species: I distinguished this bird from Herring Gull based on smaller body size, smaller head and bill, shorter wing span, uniform light tan coloration, medium brown (not black) outer primaries, translucent primaries from below, and medium brown tail band. I distinguished it from Iceland Gull by the brown outer primaries, relatively more tan coloration, and medium brown tail band. \| The original documentation form event lasted from 11:40:00/11:50:00.	Iowa Ornithologists' Union \| MS 166	34	35
Details for Accipiters during a Christmas Bird Count at Burlington, 1992	Field notes	Birds--Identification Ornithology Rare birds	1992-12-19	N/A	Manuscript, graphic, and printed material	Details for sightings of two Cooper's Hawks, Thayer's Gull and a Sharp-shinned Hawk at the Burlington area in Des Moines County, IA on December 19, 1992 by an unknown author.	Iowa Ornithologists' Union	Cooper's Hawk Thayer's Gull Sharp-shinned Hawk	Burlington Sacred Heart Cemetery Burlington Municipal Airport				Iowa Ornithologists' Union \| MS 166	34	35
Details for unusual bird sighting, 1992	Field notes	Birds--Identification Ornithology Rare birds	1992-11-08	N/A	Manuscript, graphic, and printed material	Rare bird sighting for a Thayer's Gull by Jim Fuller at Red Rock Reservoir in Marion County, IA on November 8, 1992.	Fuller, James L	Thayer's Gull	Red Rock Dam				Iowa Ornithologists' Union \| MS 166	34	35
Records Committee review for rare bird sighting of Red-throated Loon at Saylorville Reservoir, 1995	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1995-11-16	2000-11-20	Rare birds documentation form	Records Committee review for a Red-throated Loon at Saylorville Reservoir in Polk County, IA on November 16-17, 1995. Includes a record review document and a documentation form submitted to the committee.	Dinsmore, Stephen J.	Red-throated Loon	Saylorville Lake	Saylorville Res., Polk Co.	large lake	The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. \| Elimination of similar species: The smaller size, neck pattern, and bill shape and size eliminated other species of loons. \| The original documentation form event lasted from 15:48:00/16:10:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of Red-throated Loon at Pleasant Creek Lake, 1995	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1995-11-11	2000-11-20	Rare birds documentation form	Records Committee review for a Red-throated Loon at Pleasant Creek Lake in Linn County, IA on November 11, 1995. Includes a record review document and a documentation form submitted to the committee.	Kent, Thomas H. (Thomas Hugh), 1934-	Red-throated Loon	Pleasant Creek State Park	Pleasant Creek L.	artificial, deep-water lake	The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. \| Elimination of similar species: The size of the bird, shape of the bill, and contrast between light and dark argued against Common Loon. Pacific Loon would have a straight bill and darker top of head and back of neck. I did not see any chin strap, but this would have been difficult to see. The fact that I saw the eye in the white area appears to exclude Pacific Loon. The upper parts were lighter than in the two Pacific Loons that I saw this fall. The relatively white fore-neck and face suggests an adult. \| The original documentation form event lasted from 10:05:00/10:30:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting on Red-throated Loon at Cedar Lake, 1984	Administrative records Clippings (information artifacts) Field notes	Bird watching Ornithology Ornithology--Societies, etc	1984-04-03	1999-10-15	Rare birds documentation form	Records Committee review for a Red-throated Loon at Cedar Lake, IA on April 3, 1984. Includes a record review document, two articles in American Birds, an article in Iowa Bird Life, a summary of the review of the committee, and six documentation forms submitted to the committee.	Staudt, Thomas J.	Red-throated Loon	Cedar Lake	Cedar Lake, Cedar Rapids, IA		The documentation form by Thomas J. Staudt is the earliest and the one that forms the basis of this record. Other documentation forms by Carl J. Bendorf, Robert K. Myers, Francis L. Moore, Thomas H. Kent, and Peter C. Petersen were submitted later. Other observers include Jim Fuller and Jim Sandrock. \| Elimination of similar species: Horned grebes in winter plumage were present, they are about 1/2 the size of this loon, have a much shorter straight bill and the head shape is flatter. Common loon is much larger with a correspondingly large straight black bill, head held straight. Arctic loon in winter plumage would have less white in the facial area, a straight dark bill, less contrast from the facial area to cup/nape. \| The original documentation form event lasted from 06:15:00/06:45:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of three Red-throated Loons at Little Wall Lake, 1995.	Administrative records Clippings (information artifacts) Field notes	Bird watching Ornithology Ornithology--Societies, etc	1995-04-22	2000-11-19	Rare birds documentation form	Records Committee review for a Red-throated Loon at Little Wall Lake in Hamilton County, IA on April 22, 1995. Includes a record review document with votes, an Iowa Bird Life article, and four documentation forms submitted to the committee.	Proescholdt, Mark	Red-throated Loon	Little Wall Lake	Little Wall Lake - (Hamilton County)	small lake with trees along edges	The documentation form by Mark Proescholdt is the earliest and the one that forms the basis of this record. Other documentation forms by Beth Proescholdt, John Paulin, and Thomas Kent were submitted later. Other observers include Russ Widner, Caryn Hurd, Chris Paulin, Andy Hurd, Stacy Smithson, and Dawn Schwebach. \| Elimination of similar species: A Basic-Plumaged Pacific Loon has no white or pale area above or in front of the eye. It also has a sharp vertical division between dark and light on its neck. A Common Loon is bulkier and bigger and has a large thick bill whose mandibles are straight. \| The original documentation form event lasted from 14:00:00/16:00:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of a Red-throated Loon at Lake Manawa, 1994	Administrative reports Field notes	Bird watching Ornithology Ornithology--Societies, etc	1994-11-25	1996-04-25	Rare birds documentation form	Records Committee review for a Red-throated Loon at Lake Manawa in Pottawattamie County, IA on November 25, 1994. Includes a record review document with votes and a documentation form submitted to the committee.	Padelford, Babs Padelford, Loren	Red-throated Loon	Lake Manawa State Park	Lake Manawa State Park, Pottawattamie		The documentation form by Babs and Loren Padelford is the earliest and the one that forms the basis of this record. Other observers include Roland Barth. \| Elimination of similar species: Smaller with a more slender neck and bill than Common Loon. There was no tri-color line on sides of neck (white, dark gray & light gray) that would indicate a Pacific Loon. \| The original documentation form event lasted from 10:00:00/10:30:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of Red-throated Loon at Silver Lake, 1994	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1994-05-07	1996-04-26	Rare birds documentation form	Records Committee review for a Red-throated Loon at Silver Lake in Worth County, IA on May 7, 1994. Includes a record review document with votes and a documentation form submitted to the committee.	Walter, Janice L.	Red-throated Loon	Silver Lake Wildlife Management Area	Silver Lake, Worth Co., Ia [sic]	Shallow lake	The documentation form by Jan L. Walter is the earliest and the one that forms the basis of this record. Other observers include Curt Nelson, Eugene Armstrong, and Eloise Armstrong. \| Elimination of similar species: Common Loon - above comparisons. Pacific Loon - has straight, unangled bill which is not uptilted, doesn't have the white area above and in front of the eye, has sharp division between white and dark of neck. \| The original documentation form event lasted from 14:00:00/14:15:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of Red-throated Loon at Red Rock Reservoir, 1992	Administrative records Clippings (information artifacts) Field notes	Bird watching Ornithology Ornithology--Societies, etc	1992-11-07	1994-10-18	Rare birds documentation form	Records Committee review for a Red-throated Loon at Red Rock Reservoir, Marion County, IA on November 7, 1992. Includes a record review document with votes, an Iowa Bird Life article, and five documentation forms submitted to the committee.	Proescholdt, Mark	Red-throated Loon	Roberts Creek Park	Red Rock Reservoir - Roberts Creek area - (Marion Co.)	Large water area	The documentation form by Mark Proescholdt is the earliest and the one that forms the basis of this record. Other documentation forms by Diane Porter, Thomas H. Kent, Ray Cummins, and Jim Fuller. Other observers include Ann Barker, Ann Johnson, Matt Keene, Jim Sinclair, Tim Schantz, Harold White, Hank Zalatel, Beth Proescholdt, Loren Padelford, Diane Porter, David Youngblut, Tom Klein, Francis Moore, and Ray Cummins. \| Elimination of similar species: The bill size and small size of the loon helps eliminate a Common Loon. A Pacific Loon would have a sharp contrast on the side of the neck between light and dark colors. \| The original documentation form event lasted from 11:30:00/11:45:00 and 16:30:00/16:32:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of Red-throated Loon at Lake Manawa State Park, 1990	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1990-11-12	1993-07-17	Rare birds documentation form	Records Committee review for a Red-throated Loon at Lake Manawa State Park in Pottawattamie County, IA on November 12, 1990. Includes a record review document with votes and two documentation forms submitted to the committee.	Johnson, Ann	Red-throated Loon	Lake Manawa State Park	Lake Manawa State Park, Pottawattamie County, Iowa	Open water	The documentation form by Ann Johnson is the earliest and the one that forms the basis of this record. Another documentation form by Tanya E. Bray was submitted later. Other observers include Babs Padelford, BJ Rose, Ross Silcock, and Tim Schantz. \| Elimination of similar species: Cormorants could be eliminated by bill shape, among other characteristics. The bird had some similarities to a Western Grebe, but the grebe would hold its head parallel to the water, has a longer neck, and does not show the contrast between head/nape and back. Common Loon was eliminated by posture, size and shape of bill, contrast of lighter head and darker back, and more diffuse separation of upper and underparts. Pacific Loon was eliminated by the grayer underparts, diffuse separation of upper and underparts, posture, and sharp upward angle on lower mandible. \| The original documentation form event lasted from 11:50:00/12:15:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of Red-throated Loon at Coralville Reservoir, 1990	Administrative records Clippings (information artifacts) Field notes	Bird watching Ornithology Ornithology--Societies, etc	1990-11-04	1993-07-17	Rare birds documentation form	Records Committee review for a Red-throated Loon at Coralville Reservoir in Johnson County, IA on November 4, 1990. Includes a record review document with votes, an Iowa Bird Life article, and four documentation forms submitted to the committee.	Kent, Thomas H. (Thomas Hugh), 1934-	Red-throated Loon	Coralville Lake	deep part of reservoir at West Overlook (just above dam) and at Mehaffy Bridge. Coralville Reservoir, Johnson County, Iowa	deep part of reservoir at West Overlook (just above dam) and at Mehaffy Bridge	The documentation form by Thomas H. Kent is the earliest and the one that forms the basis of this record. Other documentation forms by Jim Fuller, Ann Johnson, and Carol Thompson. Other observers include Ken Lowder, Jim Scheib, Bud Goode, Cal Knight, Bernie Knight, and Beth Brown. \| Elimination of similar species: The head posture resembled a cormorant, but the bill, overall coloration, and behavior quickly excluded that possibility. The size and bill led me to an immediate identification. I was puzzled about the plumage. I expected to see a juvenile or basic-plumaged bird, but the distribution of dark coloration was that of alternate plumage. I assume that the red/black throat, lines of neck, and gray tones had faded to give one rather uniform color. The drab light may have contributed some to the failure to see color differences, but the last observation was relatively close and the texture of the feathers could be seen. \| The original documentation form event lasted from 07:45:00-08:30:00 and 12:20:00-12:45:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of Red-throated Loon at Saylorville Reservoir, 1989	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1989-11-08	1993-08-05	Rare birds documentation form	Records Committee review for a Red-throated Loon at Saylorville Reservoir in Polk County, IA on November 8, 1989. Includes a record review document and a documentation form submitted to the committee. IOU record review document has incorrect date of November 8, 1990 instead of correct date of November 8, 1989.	Dinsmore, Stephen J.	Red-throated Loon	Saylorville Lake	Saylorville Reservoir, Polk Co.-off Cherry Glen Rec. Area	large reservoir	The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. \| Elimination of similar species: The small size, head posture, small head, and short, thin, upturned bill eliminates other loons. \| The original documentation form event lasted from 16:02:00/16:40:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of Red-throated Loon at Lake Manawa, 1989	Administrative records Clippings (information artifacts) Correspondence Field notes	Bird watching Ornithology Ornithology--Societies, etc	1989-04-27	1993-07-21	Rare birds documentation form	Records Committee review for two Red-throated Loons at Lake Manawa in Pottawattamie County, IA on April 27, 1989. Includes a record review document and four documentation forms submitted to the committee.	Bray, Tanya	Red-throated Loon	Lake Manawa	Lake Manawa, Pottawattamie County		The documentation form by Tanya E. Bray is the earliest and the one that forms the basis of this record. Other documentation forms by Babs Padelford, Loren Padelford, Marc Lund, and Bob Myers were submitted later. Other observers include B.J. Rose, Doug Rose, Roger Rose, Dave Starr, and Jerry Toll. \| Elimination of similar species: Pacific Loon, eliminated by red color of throat patch and shape of bill. This bird's bill was more like that of a Eared Grebe; that is, very slender and not as loon-like as that of Pacific Loon. Pacific Loon's bill looks like a small Common Loon. Pacific Loon's bill looks like a small Common Loon. Common Loon: eliminated by size of bird, shape of bill, and red throated patch. \| The original documentation form event lasted from 16:15:00/16:45:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of Red-throated Loon at Saylorville Reservoir, 1988	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1988-11-16	1993-08-04	Rare birds documentation form	Records Committee review for a Red-throated Loon at Saylorville Reservoir in Polk County, IA on November 16, 1988. Includes a record review document and three documentation forms submitted to the committee.	Dinsmore, Stephen J.	Red-throated Loon	Jester Park	Jester Park area of Saylorville Reservoir, Polk Co.	swimming and diving on large reservoir	The documentation form by Steve Dinsmore is the earliest and the one that forms the basis of this record. Other documentation forms by Eugene Armstrong, Eloise Armstrong, and Mark Proescholdt were submitted later. \| Elimination of similar species: The body shape, posture, and black-and-white coloration identified the bird as loon. Although some Common Loons may be quite small. I think this bird was too small for even a very small Common Loon. Otherwise, the slender, upturned bill, the head posture, the contrast between the back and the neck, and the gray neck and white throat eliminated Pacific and Common Loons. \| The original documentation form event lasted from 13:46:00/15:43:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of Red-throated Loon at Saylorville Reservoir, 1986	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1986-12-01	1993-09-07	Rare birds documentation form	Records Committee review for a Red-throated Loon at Saylorville Reservoir in Polk County, IA on December 1, 1986. Includes a record review document, a summary of the review of the committee, and a documentation form submitted to the committee.	Dinsmore, Stephen J.	Red-throated Loon	Saylorville Lake	Saylorville Reservoir, Polk Co. (Cherry Glen Recreation Area)	swimming in open water off rock jetty	The documentation form by Steve Dinsmore is the earliest and the one that forms the basis of this record. \| Elimination of similar species: Common Loon eliminated by smaller size, head posture, shorter, upturned bill, speckling on back, more rounded forehead, and sharp contrast between throat and back of neck. Pacific Loon eliminated by bill shape, head posture, speckling on back, two-toned (not three-toned) neck pattern, lack of chinstrap (not definitive, but helpful), and crown color not including the eye (should include the eye on Pacific Loon). \| The original documentation form event lasted from 15:26:00/15:50:00.	Iowa Ornithologists' Union \| MS 166	7	5
Records Committee review for rare bird sighting of a Red-throated Loon at Saylorville Reservoir, 1985	Administrative records Clippings (information artifacts) Field notes	Bird watching Ornithology Ornithology--Societies, etc	1985-11-30	1996-08-18	Rare birds documentation form	Records Committee review for a Red-throated Loon at Saylorville Reservoir in Polk County, IA on November 30, 1985. Includes a record review document with votes, an Iowa Bird Life article, and two documentation forms submitted to the committee.	Dinsmore, Stephen J.	Red-throated Loon	Saylorville Lake	Saylorville Reservoir, Polk Co.	open patch of water on large, frozen reservoir	The documentation form by Steve Dinsmore is the earliest and the one that forms the basis of this record. Other documentation form by Robert K. "Bob" Myers were submitted later. \| Elimination of similar species: Common Loon eliminated by overall size, bill shape and size, and white spots on back. Arctic Loon eliminated by bill shape and black of crown not reaching eye. \| The original documentation form event lasted from 11:00:00/13:00:00 and 13:45:00/14:15:00.	Iowa Ornithologists' Union \| MS 166	7	5