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 Sandy Beach at Coralville Reservoir, 1981	Field notes	Birds--Identification Ornithology Rare birds	1981-04-26	1981-05-23	Rare birds documentation form	Rare bird documentation form for a Peregrine Falcon at Sandy Beach at Coralville Reservoir in Johnson County, IA on April 26, 1981.	Newlon, Michael C.	Peregrine Falcon	Sandy Beach Public Use Area	Sandy Beach, n. shore of Coralville Reservoir, Johnson Co, IA	Reservoir set amid cropland, pasture, forest, some 'suburban' housing. Arm of reservoir with mudflats, willow thickets.	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include Carol S. Newlon. \| Elimination of similar species: unbanded tail & large size eliminate Merlin, heavy contrast between under & upper parts, 'moustache', lack of dark axillaries eliminate Prairie Falcon. (Size & build definitely rule out other types of hawks.) \| The original documentation form event lasted from 12:15:00/12:20:00.	Iowa Ornithologists' Union \| MS 166	33	34
Rare bird documentation for Black Scoter at Cone Marsh, 1979	Field notes	Birds--Identification Ornithology Rare birds	1979-03-31	1979-04-01	Rare birds documentation form	Rare bird documentation for a Black Scoter at Cone Marsh in Louisa County, IA on March 31, 1979.	Newlon, Michael C.	Black Scoter	Cone Marsh Wildlife Management Area	Cone Marsh, Louisa Co, IA	large area of ponds, flooded fields + timber, bottomland. pond bordered by woods + flooded fields	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include CS Newlon, Tom Kent, Noel Brown, and Mona Brown. \| Elimination of similar species: Female Bufflehead has much smaller white patch on face. Other female scoters, harlequin duck have more than 1 patch + patches are smaller. Female Ruddy duck is smaller + white does not extend onto throat or neck, also differs in properties (stockier, with heavier head + neck for size). Male hooded merganser has white sides, chest, side stripes, more slender bill. \| The original documentation form event lasted from 12:15:00/12:30:00.	Iowa Ornithologists' Union \| MS 166	33	13
Rare bird documentation form for Carolina Wren at Hickory Hill Park, 1975	Field notes	Birds--Identification Birdsongs Ornithology Rare birds	1975-11-01	1975-11-20	Rare birds documentation form	Rare bird documentation form for two Carolina Wrens at Hickory Hill Park in Iowa City in Johnson County, IA on November 1, 1975.	Newlon, Michael C.	Carolina Wren	Hickory Hill Park	Hickory Hill Park, Iowa City IA	brushy ravines on gullies in Hickory Hill Park - park contains woods, open pastures, brushy grown-up old fields	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include Nicholas Halmi and Marilyn Smith Glasson. \| Elimination of similar species: eye stripes, rusty color, large size, voice elim. House, winter wrens voice, lack of white in tail, short tail rule out Bewick's (v. rare if not extinct in Iowa City area)<-(fide FW Kent). \| The original documentation form event occurred in the morning.	Iowa Ornithologists' Union \| MS 166	34	88
Rare bird documentation form for Little Blue Heron at Cone Marsh, 1978	Field notes Forms (documents)	Birds--Identification Ornithology Rare birds	1978-08-13	1978-08-21	Rare birds documentation form	Rare bird documentation form for a Little Blue Heron at Cone Marsh in Louisa County, IA on August 13, 1978	Newlon, Michael C.	Little Blue Heron	Cone Marsh Wildlife Management Area	Cone Marsh, Louisa Co, IA	large shallow, algae-filled pond; part of a much larger area of marsh, ponds, river bottom woods and fields.	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include Rich DeCoster. \| Elimination of similar species: Small size, bill & leg color rule out great egret (large, yellow bill, black legs); Snowy egret (smaller black bill, black legs & yellow feet), cattle egret (thicker neck, yellow bill), great white heron (much larger, yellow bill + legs), white phase reddish egret (bulkier neck, pink bill & dk tip, pink legs). \| The original documentation form event lasted from 10:00:00 - 10:30:00 approximately.	Iowa Ornithologists' Union \| MS 166	32	20
Rare bird documentation form for Cattle Egret at Cone Marsh, 1978	Field notes Forms (documents)	Birds--Identification Ornithology Rare birds	1978-08-21	N/A	Rare birds documentation form	Rare bird documentation form for three Cattle Egrets at Cone Marsh in Louisa County, IA on August 21, 1978	Newlon, Michael C.	Cattle Egret	Cone Marsh Wildlife Management Area	Cone Marsh, Louisa Co, IA	Weedy wet pasture at edge of large area of marshes, ponds, river bottom woods and fields.	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include Richard Hollis and Carl Bendorf. \| Elimination of similar species: yellow bill, dark legs rule out all other species, but great egret. Small size, short bill, rapid wingbeat, habit of following stock, rule out that species. \| The original documentation form event lasted from 07:40:00/08:20:00.	Iowa Ornithologists' Union \| MS 166	32	21
Rare bird documentation form for Brown Thrasher at Kent Park in Johnson County, 1975	Field notes	Birds--Identification Ornithology Rare birds	1975-12-20	1976-01-04	Rare birds documentation form	Rare bird documentation form for a Brown Thrasher at Kent Park in Johnson County, IA on December 20, 1975.	Newlon, Michael C.	Brown Thrasher	F W Kent County Park	Kent Park, Johnson Co. IA, ~ 7 mi. west of Iowa City	General: Kent Park contains old fields, some growing up to brush, second-growth woods. It is situated in farming country. Specific: Bird was in an area of dense thickets of small, dense, scrubby trees interspersed with weedy clearings	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include Roger Milkman, Marianne Milkman, Paul Milkman, and Carol Newlon. \| Elimination of similar species: Brown Thrushes eliminated by large size, bold streaking rather than spotting on breast. Finches (siskin, Female r-b. grosbeak) elim. by bill shape, size, rufous color. Sage, long-billed thrashers eliminated by rufous color, range. \| The original documentation form event lasted from approximately 11:00:00/11:02:00.	Iowa Ornithologists' Union \| MS 166	35	14
Rare bird documentation form for Western Kingbird near Croton, 1979	Field notes	Birds--Identification Ornithology Rare birds	1979-06-09	1979-08-08	Rare birds documentation form	Rare bird documentation form for a Western Kingbird near Croton in Lee County, IA on June 9, 1979.	Newlon, Michael C.	Western Kingbird	Croton	nr Croton, IA; Lee Co.	General: wire fence at edge of pasture. Specific: area of mixed woods, pasture, cropland	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include Thomas Kent and James Huntington. \| Elimination of similar species: white outer tail feathers and lack of notch in tail eliminate other yellow-breasted kingbirds; heavy build and lack of rufous in tail eliminate myarchius flycatchers. \| The original documentation form event lasted from circa 09:30:00/09:35:00.	Iowa Ornithologists' Union \| MS 166	34	72
Rare bird documentation form for Peregrine Falcon at Dunbar Slough, 1980	Field notes	Birds--Identification Ornithology Rare birds	1980-09-21	1980-09-28	Rare birds documentation form	Rare bird documentation form for a Peregrine Falcon at Dunbar Slough in Greene County, IA on September 21, 1980.	Newlon, Michael C.	Peregrine Falcon	Dunbar Slough	Dunbar Slough, Greene Co., IA	slough surrounded by farmland. Edge of marshy slough	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include Thomas Kent, Carol S. Newlon, and Thomas Shires. \| Elimination of similar species: Shape identifies it as a falcon, as does flight style. Size eliminates Merlin and Kestrel, conspicuous 'sideburns' eliminate Prairie Falcon. \| The original documentation form event lasted from approximately 09:30:00/09:35:00.	Iowa Ornithologists' Union \| MS 166	33	34
Rare bird documentation form for Yellow Rail at Cone Marsh, 1978	Field notes	Birds--Identification Ornithology Rare birds	1978-04-30	1978-05-07	Rare birds documentation form	Rare bird documentation form for a Yellow Rail at Cone Marsh in Louisa County, IA on April 30, 1978.	Newlon, Michael C.	Yellow Rail	Cone Marsh Wildlife Management Area	Cone Marsh, Louisa Co., Iowa	alfalfa field bordered to w. and s. by ledges + more fields; to n, second-growth woods; to e., extensive area of woods and marsh.	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include Thomas Kent, Thomas Staudt, Rich DeCoster, Nicholas Halmi, Carol Newlon, and Thomas Shires. \| Elimination of similar species: Sora-like build, yellow-ochre underparts, white patch on wings, eliminate all other rails. Imm. sora would lack yellow beneath + white wing patch. \| The original documentation form event lasted from 12:00:00/12:20:00.	Iowa Ornithologists' Union \| MS 166	33	39
Rare bird documentation form for Swainson's Hawk at Bayard, 1980	Field notes	Birds--Identification Ornithology Rare birds	1980-09-21	1980-09-28	Rare birds documentation form	Rare bird documentation form for three Swainson's Hawks at Bayard in Guthrie County, IA on September 21, 1980.	Newlon, Michael C.	Swainson's Hawk	Bayard	near Bayard, Guthrie Co., IA	farmland	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include Tom Shires, Carol Newlon, and Thomas Kent. \| Elimination of similar species: build, combination of white underparts + wing - linings plus dark flight -feathers eliminate other possible buteos - redtail, roughleg, broadwing, ferruginous, red-shoulder. \| The original documentation form event occurred around 11:30:00/11:40:00 approximately.	Iowa Ornithologists' Union \| MS 166	33	28
Rare bird documentation form for Tundra Swan at Sand Point at Coralville Reservoir, 1975	Field notes	Birds--Identification Ornithology Rare birds	1975-12-13	1975-12-14	Rare birds documentation form	Rare bird documentation form for a Tundra Swan at Sand Point at Coralville Reservoir in Johnson County, IA on December 13, 1975.	Newlon, Michael C.	Tundra Swan	Sand Point	Sand Pt, Coralville Reservoir, nw of Iowa City IA	edge of reservoir: grassy flats now submerged by an increase in water level. area has large 'marshy' areas of flooded grass, extensive areas of open water, some harvested corn fields, some fields of winter rye (Planted for geese), some seasonal-growth woods.	The documentation form by Michael C. Newlon is the only one submitted and forms the basis of this record. Other observers include: Nick Halmi. \| Elimination of similar species: mute swan: eliminated by all-dark bill, vertical posture of neck. Trumpeter Swan: eliminated by range. Snow Goose: eliminated by large size, lack of black in wingtips. White pelican: eliminated by proportions of neck & bill, lack of black in wingtips. \| The original documentation form event lasted from 13:00:00/14:00:00.	Iowa Ornithologists' Union \| MS 166	33	1
Rare bird documentation form for White-rumped Sandpiper at Sandpiper Recreation Area at Saylorville Reservoir, 1998	Field notes	Birds--Identification Ornithology Rare birds	1988-08-07	1988-10-07	Rare birds documentation form	Rare bird documentation form for a White-rumped Sandpiper at Sandpiper Recreation Area at Saylorville Reservoir in Polk County, IA on August 7, 1998.	Overton, Michael D.	White-rumped Sandpiper	Sandpiper Recreation Area	Iowa, Polk co., Saylorville Reservoir, Sandpiper Recreation Area	Near lakeshore of large manmade lake in mixed hardwood forest, agricultural cropland. Wet mudflat in deep ditch (outflow channel from small pond along entrance road to parking lot).	The documentation form by Michael D. Overton is the only one submitted and forms the basis of this record. \| Elimination of similar species: Other Calidris sp. except Baird's eliminated by amount of primary extension beyond tail on standing bird. Eliminate Baird's Sandpiper by white uppertail coverts. \| The original documentation form event lasted from 09:10:00/09:30:00.	Iowa Ornithologists' Union \| MS 166	34	21
Records Committee review for rare bird sighting for White-winged Dove at Riverton Wildlife Area, 1997	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1997-08-30	2000-11-24	Rare birds documentation form	Records Committee review for a White-winged Dove at Riverton Wildlife Area in Fremont County, IA on August 30, 1997. Includes a record review document with votes and a documentation form submitted to the committee.	Overton, Michael D.	White-winged Dove	Riverton Wildlife Management Area	Fremont co., Riverton Wildlife Area, .5 mile N of jct. check station road & Fremont co. Rd. J46	Open small trees and shrubs along roadside between hardwood bottomland and agricultural cropland.	The documentation form by Michael D. Overton is the only one submitted and forms the basis of this record. Another observer includes Dixie Overton. \| Elimination of similar species: Rock Dove: Wing pattern, tail pattern, head pattern, rump color. Mourning Dove: Overall shape, tail shape and pattern, wing pattern. Zenaida Dove: Breast and belly color, wing pattern, tail shape and color, common sense. \| The original documentation form event lasted from approximately 08:15:00/08:25:00.	Iowa Ornithologists' Union \| MS 166	12	10
Rare bird documentation form for Pacific Loon at Hallett's Quarry in Ames, 1999	Field notes	Birds--Identification Ornithology Rare birds	1999-05-08	1999-05-13	Rare birds documentation form	Rare bird documentation form for a Pacific Loon at Hallett's Quarry in Ames in Story County, IA on May 8, 1999.	Overton, Michael D.	Pacific Loon	Ada Hayden Heritage Park	Iowa, Story co., Ames, Hallett's Quarry	Lake in old quarry at edge of urban residential area	The documentation form by Michael D. Overton is the only one submitted and forms the basis of this record. Other observers include Dixie Overton, Michael Freiberg, Kevin Healy, and Hank Zaletel. \| Elimination of similar species: Red-throated Loon by parallel sided bill, horizontal bill and head position, no white areas above or in front of the eye, distinct straight demarcation between light and dark areas on head and sides of neck, lack of white spots on back. Arctic Loon by presence of "chinstrap", lack of white flank patches, realistic attitude. Common Loon by smaller size, smaller parallel sided bill, rounded crown, no white areas in front of or above eye, nape lighter than back, white auricular area, distinct straight demarcation between light and dark areas on head and sides of neck. Yellow-billed Loon by smaller size, smaller parallel sided bill, rounded crown, no white areas in front of or above eye, white auricular area, distinct straight demarcation between light and dark areas on head and side of neck.\| The original documentation form event lasted from 17:30:00/17:45:00.	Iowa Ornithologists' Union \| MS 166	32	9
Records Committee review for rare bird sighting of California Gull at Cherry Glen Recreation Area at Saylorville Reservoir, 1997	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1997-12-09	2000-11-24	Rare birds documentation form	Records Committee review for a California Gull at Cherry Glen Recreation Area at Saylorville Reservoir in Polk County, IA on December 9, 1997. Includes a record review document with votes and a documentation form submitted to the committee.	Overton, Michael D.	California Gull	Cherry Glen Recreation Area	Polk co., Saylorville Reservoir, Cherry Glen Recreation Area	On ice along lakeshore of large manmade lake in mixed hardwood forest agricultural cropland.	The documentation form by Michael D. Overton is the only one submitted and forms the basis of this record. Other observers include Eugene Armstrong and Eloise Armstrong. \| Elimination of similar species: Ring-billed Gull, Herring Gull: Immatures of both species were present so direct comparisons were possible. Bill color, shape, and size reletive [sic] to head. Tail and rump color. Wing color and pattern especially mantle, greater coverts, and secondaries. \| The original documentation form event lasted from 10:20:00/10:55:00.	Iowa Ornithologists' Union \| MS 166	11	1
Rare bird documentation form for Merlin at Boone County, 1999	Field notes	Birds--Identification Ornithology Rare birds	1999-01-01	N/A	Rare birds documentation form	Rare bird documentation form for a Merlin at Boone County, IA on January 1, 1999.	Havlik, Mike	Merlin	Boone County	Boone County	Bird was spotted flapping about 1 foot off of the ground, landed in the corner of a corn field and began feeding on an unidentified bird.	The documentation form by Michael Havlik is the only one submitted and forms the basis of this record. Other observers include John Schmitz and Jason O'Brian. \| Elimination of similar species: American Kestrel - no black mustache marks, no rufous on back. Sharp-shinned Hawk - pointed wings, dark eye, wide tail band, open field habitat. Peregrine and Prairie Falcon - smaller size, lack of bold mustache. \| The original documentation form event lasted from 11:30:00/11:45:00.	Iowa Ornithologists' Union \| MS 166	33	32
Records Committee review for rare bird sighting for Smith's Longspur northeast of Lone Tree, 1982	Administrative records Clippings (information artifacts) Field notes	Bird watching Ornithology Ornithology--Societies, etc	1982-03-27	1999-10-15	Rare birds documentation form	Records Committee review for thirty or more Smith's Longspurs northeast of Lone Tree on the line of Johnson and Muscatine Counties, IA on March 27, 1982. Includes a record review document with votes, an article in American Birds, an article in Iowa Bird Life, a summary of the review, and three documentation forms submitted to the committee.	Newlon, Michael C.	Smith's Longspur	Lone Tree	Johnson-Muscatine Co. line, 6 mi S of Hwy 6	General: large area of farmland: pasture, stubble fields; few trees Specific: Corn + soybean stubble	The documentation form by Michael Newlon forms the basis of this record. Other documentation forms by Rick Hollis and Thomas H. Kent were submitted. Another observer was Carol Newlon. \| Elimination of similar species: Call notes and behavior strongly suggest longspur, as does association with lapland: tail pattern, face pattern, coloration suggest Smith's. (over) voice + strong facial pattern rules out vesper sparrow (as does numbers and behavior. Lack of white in greater coverts rules out ♀/i lark bunting. \| The original documentation form event lasted from 08:30:00/09:30:00.	Iowa Ornithologists' Union \| MS 166	13	42
Records Committee review for rare bird sighting for Curve-billed Thrasher west of Solon, 1980	Administrative records Clippings (information artifacts) Correspondence Field notes	Bird watching Ornithology Ornithology--Societies, etc	1980-11-17	1999-10-15	Rare birds documentation form	Records Committee review for a Curve-billed Thrasher west of Solon in Johnson County, IA on November 17, 1980. Includes a record review document with votes, an article in American Birds, an article in Iowa Bird Life, correspondence relevant to review, and six documentation forms submitted to the committee.	Newlon, Michael C.	Curve-billed Thrasher	Solon	Solon, IA	General: mixed cropland/timber/houses. Specific: yard with small trees; adjacent to brushy creek bottom.	The documentation form by Michael Newlon is the earliest and the one that forms the basis of this record. Other documentation forms by Thomas Kent, Peter C. Petersen, Joe Schaufenbuel, Robert Myers, and Francis Moore were submitted later. Other observers include Carl Berridge, Ruby Jean Berridge, Thomas Shires, Russell Hays, Tom Stone, Sr., Tom Stone, Jr., and other unidentified observers. \| Elimination of similar species: The two other grey, speckle-breasted thrashers, Bendire's and Sage, have smaller, less decurved bills; Sage has much stronger ventral marking and wing-bars, is smaller. \| The original documentation form event lasted from 10:50:00/10:55:00 as reported by Thomas Kent.	Iowa Ornithologists' Union \| MS 166	13	11
Rare bird documentation form for Peregrine Falcon at Babcock Access, 1982	Field notes	Birds--Identification Ornithology--Societies, etc Rare birds	1982-10-10	1982-12-06	Rare birds documentation form	Rare bird documentation form for a Peregrine Falcon at Babcock Access in Hawkeye Wildlife Area in Johnson County, IA on October 10, 1982.	Newlon, Michael C.	Peregrine Falcon	Babcock Access	Babcock lake Road, Hawkeye Wildlife Area, Johnson Co. IA	area of dead trees at edge of reservoir	The documentation form by Michael Newlon is the only one submitted and forms the basis of this record. \| Elimination of similar species: Dark bar through eye (wide), coloration, falcon shape eliminate Prairie Falcon, Gyrfalcon. \| The original documentation form event lasted from 09:00:00/09:30:00.	Iowa Ornithologists' Union \| MS 166	33	34
Rare bird documentation form for Peregrine Falcon at Coralville Reservoir, 1983	Field notes	Birds--Identification Ornithology Rare birds	1983-10-02	1983-11-28	Rare birds documentation form	Rare bird documentation form for a Peregrine Falcon at Ranch Corner at Coralville Reservoir in Johnson County, IA on October 2, 1983.	Newlon, Michael C.	Peregrine Falcon	Hawkeye Wildlife Management Area	Ranch Corner, Coralville Reservoir, Johnson Co IA	Reservoir flooplain with dead trees, weedy flats, willows	The documentation form by Michael Newlon is the only one submitted and forms the basis of this record. \| Elimination of similar species: face pattern eliminates only similar falcons. \| The original documentation form event lasted from 12:00:00/13:00:00.	Iowa Ornithologists' Union \| MS 166	33	34
Rare bird documentation form for Long-billed Dowitcher at Hawkeye Wildlife Area, 1984	Field notes	Birds--Identification Ornithology Rare birds	1984-09-23	1984-09-25	Rare birds documentation form	Rare bird documentation form for ten Long-billed Dowitchers at Hawkeye Wildlife Area in Johnson County, IA on September 23, 1984.	Newlon, Michael C.	Long-billed Dowitcher	Hawkeye Wildlife Management Area	pond E of Dupont Br. Rd, Hawkeye WA Johnson Co IA	muddy pool on reservoir floodplain	The documentation form by Michael Newlon is the only one submitted and forms the basis of this record. \| Elimination of similar species: scapular pattern, blurry chest markings (rather than 'speckles'), soft edges to side-bars, tail pattern, date, indicate long-bills. \| The original documentation form event lasted from approximately 16:00:00/16:45:00.	Iowa Ornithologists' Union \| MS 166	34	26
Records Committee review for rare bird sighting for Prairie Warbler at MacBride Nature Recreation Area, 1977	Administrative records Field notes	Bird watching Ornithology Ornithology--Societies, etc	1977-05-21	1993-08-19	Rare birds documentation form	Records Committee review for a Prairie Warbler at MacBride Nature Recreation Area in Johnson County, IA on May 21, 1977. Includes a record review document with votes and a documentation form submitted to the committee.	Newlon, Michael C.	Prairie Warbler	Macbride Nature Recreation Area	McBride [sic] Field campus (NE of No. Liberty, IA)	Old field with saplings, poison ivy, briars, but rather sparsely placed. Second growth woods in one side of field.	The documentation form by Michael Newlon is the only one submitted and forms the basis of this record. Another observer was Rich DeCoster. \| Elimination of similar species: of the other warblers with yellow underparts + streaks + wingbars, none other have the combination of (1) facial pattern described (2) brown streaks on back (3) song \| The original documentation form event occurred at 09:30:00/09:50:00 and around 12:00:00.	Iowa Ornithologists' Union \| MS 166	13	22
Rare bird documentation form for Western Grebe at Sandy Beach at Coralville Reservoir, 1981	Field notes Forms (documents)	Birds--Identification Ornithology Rare birds	1981-05-10	1981-05-23	Rare birds documentation form	Rae bird documentation for a Western Grebe at Sandy Beach at Coralville Reservoir in Johnson County, IA on May 10, 1981.	Newlon, Michael C.	Western Grebe	Sandy Beach Public Use Area	Sandy Beach, Coralville Reservoir, Johnson Co. IA	large reservoir, surrendered by forest and cropland	The documentation form by Michael Newlon is the only one submitted and forms the basis of this record. Other observers include Carol Newlon, Cal Knight, Bernie Knight, and Thomas Kent. \| Elimination of similar species: Long neck & pointed bill indicate a grebe: large size & color patterns eliminate other grebes. \| The original documentation form event lasted from 15:00:00/15:20:00.	Iowa Ornithologists' Union \| MS 166	32	15
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 Yellow-rumped Warbler at Coralville Dam, 1981	Field notes	Birds--Behavior Birds--Identification Birdsongs Ornithology Rare birds	1981-10-27	N/A	Rare birds documentation form	Rare bird documentation form for a Yellow-rumped Warbler at Coralville Dam in Johnson County, IA on October 27, 1981.	Newlon, Michael C.	Yellow-rumped Warbler	Coralville Dam	woods below Coralville Dam	tangle/blow down, weed patch near riverbank	The documentation form by Michael Newlon is the only one submitted and forms the basis of this record. Other observers include James Sandrock, Mary Noble, Ed Carpenter, and Inez Marks. \| Elimination of similar species: Lack of streaking on underparts, yellow at sides of breast, yellow rump eliminate all other warblers. \| The original documentation form event lasted from around 09:30:00/09:35:00.	Iowa Ornithologists' Union \| MS 166	35	26