Confusing hummingbirds of Guatemala

• 2023 Biggest Year (1)
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• Common Birds in Fort Collins (30)
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• Snowy or Kentish Plover? (52)
• Hybrid Greater x Lesser Scaup (NOT) (13)
• 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)
• Kumlien's Gull, Aurora CO, 11 Jan 2014 (3)
• Kumlien's Gull, Aurora CO, 11 Jan 2014 (7)
• Confusing Fall Hummingbirds (1)
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• Laughing Gull, Morgan County, Colorado, 31 Aug 2013 (14)
• Rufous-necked Wood-Rail, New Mexico, 13 July 2013 (3)
• Sandwich Tern, Teller County, Colorado, 30 June 2013 (10)
• Painted Redstart, Montezuma County, Colorado, 17 May 2013 (3)
• Varied Thrush, Larimer County, Colorado, 17 March 2013 (4)
• Redpolls in Fort Collins, Larimer County, CO, Dec 2012 (0)
• 23 Dec 2012 (22)
• 30 Dec 2012 (18)
• 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)
• Philadelphia Vireo, Larimer County, Colorado, 8 October 2012 (5)
• Buff-breasted Sandpipers, Morgan County, Colorado, 3 Sep 2012 (13)
• Mountain Plovers, Morgan County, Colorado, 3 Sep 2012 (4)
• 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)
• Brown Pelican, Larimer County, Summer-Fall 2006 (0)
• Carol Amey's photos (3)
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• Swans in Loveland 2005 (11)
• Juv Swan Update (Loveland Tundra? Swan) (5)
• 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)
• Hybrid Geese (Chen x Branta), Colorado (24)
• Cliff Swallow or Cave Swallow? (9)
• Black Phoebe or Mountain Bluebird? (7)
• Large Gulls (0)
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• Mystery Gull A (3)
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• Photos by Scott Surner (6)
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• Mystery Gull E (2)
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• Mystery Gull I (5)
• More photos from 3 March 2008 (11)
• Mystery Gull J (12)
• Mystery Gull K - possible Slaty-backed Gull (0)
• On Land (7)
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• Mystery Gull L - possible Slaty-backed Gull (1)
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• 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)
• Mystery Gull AD (15)
• Mystery Gull AE, candidate Vega Gull (4)
• Great Black-backed Gull or something else? (7)
• Is this just a Lesser Black-backed Gull? (3)
• Mystery Gull AH (8)
• Vega Gull? (8)
• Vega (?) Gull (19)
• Thiceland Gull? (7)
• Mystery Gull AL (17)
• Mystery Gull AM Possible Slaty-backed Gull (10)
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• 2006 (12)
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• 27 Mar 2010 Windsor CO (4)
• 30 Dec 2013 Fort Collins CO (6)
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• GBBG 4th cycle, Larimer County, Colorado (4)
• GBBG 1st cycle, Boulder County, Colorado (4)
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• graellsi (2nd cycle) (2)
• Colorado, 22 March 2009 (7)
• Colorado, 13 April 2013 (4)
• graellsi (3rd cycle) (15)
• graellsi (4th cycle) (2)
• graellsi (5th cycle and definitive adult) (1)
• 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)
• graellsi (definitive adult) (2)
• Lesser Black-backed Gull (adult) 3 October 2008, Weld County, Colorado (6)
• Lesser Black-backed Gull (adult basic), 1 Jan 2012, Larimer landfill, Colorado (USA) (2)
• intermedius (adult) (15)
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• Subspecies albertaensis 6 Dec 2014 in Larimer County, Colorado (6)
• Ring-billed Gulls (12)
• Mew Gull, Colorado, 20 March 2008 (9)
• Gulls at Horsetooth Reservoir 11 November 2011 (21)
• Gulls at Lake Loveland, 28 December 2011 (12)
• Gulls at Horseshoe Lake, 12 April 2014 (16)
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• Gulls at Horseshoe Lake, 7 Dec 2014 (19)
• Gulls at Larimer Landfill 13 Dec 2014 (15)
• Gulls at Larimer Landfill, 28 Feb 2015 (64)
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• Guatemala April 2005 (9)
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• Long-tailed Jaeger, Boulder County, Colorado, 7 Sep 2008 (8)
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