Mangoverde :: World Bird Guide :: Herons, Egrets and Bitterns :: Least Bittern

Least Bittern Ixobrychus exilis

Described by: Gmelin (1789)
Alternate common name(s): None known by website authors
Old scientific name(s): None known by website authors


Lincoln Park, Chicago, Cook County, Illinois, USA - May 10, 2002 © Kanae Hirabayashi  Patagonia Lake State Park, Santa Cruz County, Arizona, USA - May 3, 2002 © Rob Pavey  South Padre Island, Cameron County, Texas, USA - Feb 14, 2003 © Kent Nickell  Napo Wildlife Center, Ecuador - Jan, 2007 © Lou Hegedus  Napo Wildlife Center, Ecuador - Jan, 2007 © Lou Hegedus 
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E. North America; W. North America and West Indies; C. Central America to n. and e. South South America;
Fragmented distribution;
(1) Se. Canada (s. Manitoba, s. Ontario, s. Quebec to s. New Brunswick and Nova Scotia) and United States (c. Montana, ne. North Dakota, nw. Minnesota, c. Wisconsin, n. Michigan and Atlantic coast from Maine to Florida and Gulf coast states). W. United States (se. Oregon, interior and s. coastal California along Mexican border, sc. New Mexico, w. and s. Texas), Mexico (Atlantic slope), West Indies (n. Bahamas, Greater Antilles and Lesser Antilles in Guadeloupe and Marie Galante), Belize, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica and c. Panama (Chagres River Valley).
(2) Nw. Mexico (c. Baja and Pacific slope of Sonora to Gerrero).
(3) Lowlands and mountains of e. Panama, n. Colombia, n. Venezuela, Trinidad, Guyana, Surinam and Guiana to se. Brazil (ne. Bahia), ex. n. Bolivia (Beni), Paraguay, extreme ne. Argentina (Missiones, Corrientes). Isolated population in e. Ecuador (Rio Napo) of unclear racial status.
(4) C. Colombia.
(5) Coastal w. Peru (Libertad to Lima).
North America n. of Mexican border
Summer: s. MAN, se. ONT, s. QUE, se. NBR, sc. ORG, CAL, lower Colorado and Rio Grande Rivers, e. NDK, e. SDK, NEB, e. KAN, e. OKA, e. and s. TEX, IWA, MOU, ARK, LOU, WIS, ILL, MIC, IND, OHO, KTY, TEN, MIS, ALB, nw. and se. PEN, NYK, e. MYD, DEL, e. VIR, w. WVA, e. NCA, e. SCA, GEO, FLA, NJY, s. VMT, s. NHP, coastal MAE, MASS, CNT, RID;
Winter: s. CAL, e. TEX, s. FLA.


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Location unknown - Date unknown Source:
Location unknown - Date unknown Source:


Clements, James F. Birds of the World: A Checklist. Vista, CA: Ibis Publishing Company, 2000.


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