2nd cycle Thayer's Gull

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• Purple Finch in Larimer County, 3 January 2015 (4)
• Hybrid Ross's x Cackling Goose in Larimer County, 24 Dec 2014 (7)
• Mexican, Mottled or hybrid Duck? (13)
• A melanistic Hairy Woodpecker, 24 June 2014, Rist Canyon CO (3)
• Painted Redstart, Weld County, 1 May 2014 (4)
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• Laughing Gull, Morgan County, Colorado, 31 Aug 2013 (14)
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• 23 Dec 2012 (22)
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• Little Gull at Windsor Lake, Weld County, Colorado, 2 Dec 2012 (6)
• Brambling, Jefferson County, Colorado, 20 November 2012 (4)
• McCown's Longspur, Park County, CO, 27 October 2012 (9)
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• Buff-breasted Sandpipers, Morgan County, Colorado, 3 Sep 2012 (13)
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• Little Gulls at Union Reservoir, Weld County, Colorado 1 Dec 2011 (6)
• Atlantic Brant at Chatfield State Park, Jefferson County, Colorado, 30 Nov 2011 (9)
• Surf Scoter, Loveland, Colorado, 25 October 2011 (1)
• Yellow-crowned Night-Heron, Greeley, CO, June 2011 (4)
• Rufous-collared Sparrow in Georgetown, Colorado 8 May 2011 (12)
• Duck Hybrid, Meeker, Colorado 22 May 2011 (6)
• Ross's Gull, Arapahoe County, Colorado 19 November 2010 (10)
• Grasshopper Sparrow, Larimer County, Colorado13 November 2010 (12)
• Winter Wren in Lincoln County, Colorado, 8 Oct 2010 (5)
• Pine Warbler in Ovid, Colorado 4 July 2010 (8)
• "Traill's" Flycatcher, eastern Colorado 15 June 2010 (6)
• Another mystery vireo (18)
• Red-shouldered Hawk, Windsor, Colorado (USA), January 2010 (6)
• Photodocumentation of Chihuahuan Raven in Larimer County CO, 23 November 2009 (6)
• Mystery Loon in New York, 12 November 2009 (13)
• Possible Aleutian Goose in Larimer County, Colorado, 5 Oct 2009 (4)
• Hudsonian Godwit in Larimer County, Colorado, 24 Sep 2009 (7)
• Red Knot in Larimer County, Colorado, September 2009 (10)
• Dowitcher Identity Crisis (5)
• Neotropic Cormorant in Colorado 14 Aug 2009 (3)
• Glossy Ibis or hybrid (17)
• Eastern Meadowlark, Loveland, Colorado, 1 Jun 2009 (5)
• Possible Blue-headed Vireo, Loveland, Colorado, 10 May 2009 (16)
• Vermilion Flycatcher, Boulder County, 18 April 2009 (4)
• Ancient Murrelet in Pueblo, Colorado, 16 November 2008 (1)
• Gyrfalcon, South Park, Colorado (USA), 10 November 2008 (27)
• Least Sandpiper in winter in Larimer County, Colorado (2)
• Red-bellied Woodpecker in Loveland, Colorado 1 Jan 2008 (6)
• Odd Golden-Plover in Colorado (11)
• Better photos from David Waltman (8)
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• Swans continue in Loveland on 3 Dec 2005 (4)
• Tundra Swan returns to southwest Loveland (6)
• Trumpeter Swan near Fort Collins, Larimer County, January 2008 (1)
• Trumpeter Swan in Larimer County,Nov - Dec 2011 (6)
• Yellow-throated Vireo nesting record, Colorado, 2002 (5)
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• Photos by Scott Surner (6)
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• Mystery Gull E (2)
• Mystery Gull F: Runt California Gull (3)
• Mystery Gull G (9)
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• More photos from 3 March 2008 (11)
• Mystery Gull J (12)
• Mystery Gull K - possible Slaty-backed Gull (0)
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• Mystery Gull L - possible Slaty-backed Gull (1)
• Mystery Gull M (13)
• Mystery Gull N (19)
• Mystery Gull O - possible Vega Gull (25)
• Mystery Gull Q - possible Vega Gull (7)
• Mystery Gull R - probable Thayer's Gull (2)
• Mystery Gull S (5)
• Mystery Gull T - possible Vega Gull (3)
• Mystery Gull W (7)
• Mystery Gull X (3)
• Mystery Gull Y Possible Vega Gull (22)
• Mystery Gull Z (18)
• Mystery Gull AA (28)
• Mystery Gull AB (7)
• Mystery Gull AC Possible Vega Gull adult (34)
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• Colorado, 22 March 2009 (7)
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• Lesser Black-backed Gull (5th cycle) 20 September 2006, Horseshoe Lake, Loveland, Colorado (10)
• Lesser Black-backed Gull (5th-cycle), 27 November 2013, Larimer County Landfill, Colorado (5)
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• Subspecies albertaensis 6 Dec 2014 in Larimer County, Colorado (6)
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