The majority of least bitterns that breed in … Least Bittern. Breeding biology of the Least Bittern. 2014. It winters along the Atlantic coast, primarily in Florida and along the Gulf of Mexico, and in the region extending from California, Texas and Florida to Panama. It is 11-14.2 in (28-36 cm) long, has a 16.9 in (43 cm) wing span, and weighs 2.8 oz (80 g). Population Abundance. Close ), both renesting after depredation and raising two broods (Bogner and Baldassarre 2002a Bogner, H. E. and G. A. Baldassarre. threats to Least Bitterns throughout their range. The least bittern range extends from southeastern Canada south through the U.S. and east to the Atlantic Coast, but they are absent along the entire Appalachian Mountain range. In September 2007, for instance, a migrant was found at Vila do Porto, Azores, in the middle of the Atlantic Ocean. 1992). In shape and secretive habits it resembles the more familiar American Bittern, Botaurus lentiginosus, but it is much smaller and somewhat more colourful. The Canadian population … They prefer to escape on foot and hide than to take flight. Body mass is from 51 to 102 g (1.8 to 3.6 oz), with most least bitterns weighing between 73 and 95 g (2.6 and 3.4 oz), making this perhaps the lightest of all herons. The eggs are pale blue or green.  More than 50% of the historical records are from the Toronto region of Ontario. Ardetta exilisArdetta neoxenaIxobrychus exilis neoxenusIxobrychus neoxenus. These birds make cooing and clucking sounds, usually in early morning or near dusk. In w. This species is largely absent from the Appalachians. These birds migrate from the northern parts of their range in winter for the southernmost coasts of the United States and areas further south, travelling at night. Wilson Bulletin 114 (3):297-308. The least bittern (Ixobrychus exilis) is a small heron, the smallest member of the family Ardeidae found in the Americas. The least bittern and much larger and different-looking American bittern often occupy the same wetlands but may have relatively little interaction because of differences in foraging habits, preferred prey, and timing of breeding cycles. Least Bittern Ixobrychus exilis Species information The Least Bittern, Ixobrychus exilis, is the smallest heron in the Western Hemisphere, seldom seen in its dense marsh habitat. Herons, Egrets, and Bitterns(Order: Pelecaniformes, Family:Ardeidae). John James Audubon noted that a young captive Least Bittern was able to walk with ease in a 1.5-inch gap between two books, even though the bird's body normally measured 2.25 inches across—indicating that it could compress its body to an extraordinary degree to squeeze between marsh stems and reeds. But these diminutive herons reward patience and will charm birders persistent enough to discover them in their wetland haunts. Walk slowly and pause to listen for the rapid, quiet coo-coo-coo-coo song of males. Home range, movement, and nesting of Least Bitterns in western New York. RANGE: Least Bitterns breed from southeastern Canada through the eastern and central U.S to Mexico and Costa Rica. This wetland complex consists of 60% wetlands (including They are still fairly common but are more often heard than seen. The furtive Least Bittern is often little more than a voice in the reeds that is frustratingly difficult to locate. Least Bitterns overwinter along the Atlantic Coastal Plain south to the Gulf Coast as well as Baja … Melvin. , The bird has a large range and a large total population, and the International Union for Conservation of Nature has assessed its conservation status as being of "Least Concern". The grackles also aggressively chase or mob hawks and gulls, another advantage for the bitterns.
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