Bill deformities in songbirds

This compilation of bill deformities is property of the Rouge River Bird Observatory. Do not use or cite without written permission. Copyright for photos is held by photographers. Please do not use without permission from individual listed.

Flycatchers to Horned Lark (pg 1)
Swallows through bluebirds (pg 2)
Thrushes through European Starling (pg 3)
Warblers through towhees (below)
Sparrows through orioles (pg 5)
Purple Finch through House Sparrow + Literature Cited (p6)
Bill Tumors, Most Due to Avian Pox


Warblers through towhees


Species

Details

Source

Ovenbird (Seiurus aurocapilla)Photo dated 5 Oct 2008; U-U; Edinburg, NY; maxilla curved down at tip, mandible missing or unhinged-looking, pointing downward at a steep angleFlickr
Worm-eating
Warbler
(Helmitheros vermivorum)
Sept 2007; Walls of Jericho, Jackson Co., AL; maxilla elongatedElliot Schunke,(ewschunke AT hotmail.com)
Northern
Waterthrush
(Parksia noveboracensis)
30 April 2007; AHY-U; Dearborn, Wayne Co., MI; maxilla bill eroded and shortened, perhaps healed pox (cross referenced in bill tumor table)Rouge River Bird Observatory, Julie Craves (jac.rrbo AT gmail.com)
Black-and-white Warbler (Mniotilta varia)12 Sep 1989; HY-M; Rector, PA; maxilla crossed right, due to injury?Powdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Prothonotary Warbler (Protonotaria citrea)13 Oct 2012; HY-F; Key Biscayne, FL; maxilla elongated, mandible split with each side curving inward Robin Diaz (rd4birds AT bellsouth DOT net)
Prothonotary WarblerPhoto dated 31 Aug 14; U-U; Lettuce Lake Park, Tampa, FL; crossed at tipFlickr
Tennessee Warbler (Oreothlypis peregrina)25 Sep 1977; HY-U; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol.com)
Tennessee Warbler15 Oct 2005; HY-U; near Amherstberg, Ontario; maxilla twisted and short, overlapping mandibleHoliday Beach
Migration Observatory
Tennessee Warblerphoto dated 7 Dec 2015; U-U; Saco River Walk, York Co., ME; bill slightly crossed at tipFlickr
Nashville Warbler (Oreothlypis ruficapilla)6 Nov 1974; HY-F; Rector,PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol.com)
Nashville Warbler19 May 1997; SY-U; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Mourning Warbler (Geothlypis philadelphia)18 Sep 03; HY-F; Burdett, NY; crossed, maxilla shorter than bottomJohn & Sue Gregoire, Kestrel Haven Avian Migration Obs.,(khmo aT att.net)
Common Yellowthroat (Geothlypis trichas)12 Sep 1984; HY-M; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Common Yellowthroat Northampton Co., VA, fall 1998Larry Robinson (LarryRob aT aol.com)
Common Yellowthroat8 Aug 2003; HY-M; Burdett, NY; entire bill missing back to nares - appears chewedJohn & Sue Gregoire, Kestrel Haven Avian Migration Obs.,(khmo aT att.net)
Common Yellowthroat1 Sep 2003; HY-M; Burdett, NY; crossed, mandible shortJohn & Sue Gregoire, Kestrel Haven Avian Migration Obs.,(khmo aT att.net)
Common Yellowthroat19 May 2008; AHY-M; near Oahe Dam, Stanley Co., SD; slightly crossed and did not close properlyDoug Backlund (Doug.Backlund AT state.sd.us)
Hooded Warbler (Setophaga citrina)Female; Apopka, FLClay Black (clay.black AT swfwmd.state.fl.us)
Hooded Warbler5 Oct 1969; HY-M; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Hooded WarblerHY-M; 6 Sep 2003; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Hooded WarblerHY-M; 10 Sep 2003; Rector, PA; shriveled end of maxillaPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
American Redstart (Setophaga ruticilla)12 Sep 1971; HY-F; Rector, PA; maxilla crossed rightPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Cape May Warbler (Setophaga tigrina)27 Sep 1974; HY-F; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Cape May Warbler27 Spe 1975; HY-F; Rector, PA; slightly crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Cape May Warbler5 Oct 1984; HY-F; Rector, PA; maxilla crossed rightPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Yellow Warbler (Setophaga petechia)Alberta, Canada(gmbooth AT telusplanet.net)
Yellow Warbler26 May 1997; SY-F; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Chestnut-sided Warbler (Setophaga pensylvanica)10 Sep 2006; HY-U; both mandible and maxilla tips bent slightly left (like Wrybill); Metro Beach Metropark, Macomb Co., MIAllen Chartier (amazilia1 AT comcast.net)
Blackpoll Warbler (Setophaga striatus)21 Sep 1986; HY-F; Rector, PA; maxilla crossed leftPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Black-throated Blue Warbler (Setophaga caerulescens)26 Oct 2004; HY-F; Key Biscayne, FL; maxilla crossed over mandibleRobin Diaz (rd4birds AT bellsouth DOT net)
Yellow-rumped Warbler (Setophaga coronata)27 Oct 1993; HY-M; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Yellow-rumped Warbler10 Oct 1994; HY-F; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Grace's Warbler (Setophaga graciae )28 Jun 2011; U-U; Coconino National Forest, Mogollon Rim, Buck Springs, Coconino Co., AZ; both elongated, mandible off-centerFlickr
Golden-cheeked Warbler (Setophaga chrysoparia)13 July 2014; L/HY-F; Baker Sanctuary, Leander, Travis Co., TX; crossedJulia Land via Christopher Murray (christophermurra AT hotmail DOT com
Wilson's Warbler (Cardellina pusilla)4 Sep 1977; AHY-U; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Wilson's Warbler4 Oct 2009; HY-M; Keene, NH; crossedKate Yard (kate AT aveo DOT org)
Yellow-breasted Chat (Icteria virens)May 1995; ASY-f; CA; maxilla; 6.77mm longer than mandibleThomas Leeman (VentanaWS AT aol.com)
Yellow-breasted Chat27 May 1972; AHY-M; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Summer Tanager (Piranga rubra)10 Sep 2003; HY-F; Rector, PA; slightly crossed at tipPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Scarlet Tanager (Piranga olivacea)13 Jul 1991; HY-M; Rector, PA; crossedPowdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Scarlet Tanager27 Jun 2010; AHY-M; Bucktoe Creek Preserve, Chester Co., PA; crossed at tips; some leucistic feathers as wellFlickr
Scarlet Tanager27 Jun 2010; AHY-M; Bucktoe Creek Preserve, Chester County, PA; crossed at tipFlickr
Western Tanager (Piranga ludoviciana)30 Aug 2013; HY-U; Thompson Falls, MT; maxilla slightly humped at tipJim Greaves (lbviman AT blackfoot DOT net)
Western Tanager21 Aug 2015; U-U; Thompson Falls, MT; maxilla and mandible bentJim Greaves (lbviman AT blackfoot DOT net)
Eastern Towhee (Pipilo erythrophthalmus)20 Oct 1974; HY-F; Rector, PA; crossed Powdermill Nature Reserve, Robert S. Mulvihill
(mulvipnr AT westol DOT com)
Eastern Towhee21 Sep 2004; HY-F; Newburyport, MA; severely crossedBrian Johnson, Joppa Flats Banding Station (baidaj AT
yahoo.com)
Spotted Towhee (Pipilo maculatus)AHY-M; 12 May 1999; near Pierre, SDDoug Backlund (Doug.Backlund AT state.sd.us)
Spotted Towhee21 Aug 2013; L/HY-U; Thompson Falls, MT; maxilla crossed over mandibleJim Greaves (lbviman AT blackfoot DOT net)

Maxilla = Top, Mandible = Bottom.

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