American pygmy kingfisher
The American pygmy kingfisher is a species of "water kingfisher" in subfamily Cerylinae of family Alcedinidae. It is found in the American tropics from southern Mexico south through Central America into every mainland South American country except Chile and Uruguay. It also occurs on Trinidad.
Taxonomy and systematics
The first formal description of the American pygmy kingfisher was by the German zoologist Peter Simon Pallas in 1764 under the binomial name Alcedo aenea. The specific epithet aenea is from the Latin aeneus meaning "of a bronze colour". The current genus Chloroceryle was erected by Johann Jakob Kaup in 1848.A molecular phylogenetic study published in 2006 found that the American pygmy kingfisher was a sister species to a clade containing the green-and-rufous kingfisher and the green kingfisher.
Two subspecies are currently recognized, the nominate C. a. aenea and C. a. stictoptera.
Description
The American pygmy kingfisher is about long. Males weigh and females. It has the typical kingfisher shape, with a shaggy crest and long heavy bill. The bill is black with some pale yellow at the base of the mandible and its legs and feet are pinkish to light gray. Males of the nominate subspecies have a dark glossy green head and upperparts with a golden wash separated by a narrow rufous collar. Their tail is a bluer green. They have black lores with a thin rufous line in front of the eye. Their chin, throat, and most of their underparts are rufous that is deeper on the breast and flanks. The center of their breast and their undertail coverts are white. Adult females are similar with the addition of a dark green band across their upper breast. Juveniles have paler underparts than adults and buffy spots on their wings; males have green-black streaks on their breast and females' breast band is often incomplete. Subspecies C. a. stictoptera has obvious lines of white spots on their secondaries and some white on the rump. The two forms intergrade in central Costa Rica.Distribution and habitat
Subspecies C. a. stictoptera of American pygmy kingfisher is the more northerly of the two. It is found from the southern Mexican states of Puebla, Veracruz, Yucatán, and Chiapas south through Belize, Guatemala, El Salvador, Honduras, and Nicaragua to central Costa Rica. The nominate subspecies is found from central Costa Rica through Panama into Colombia. From there it occurs west of the Andes to central Ecuador and east and south into Venezuela, the Guianas, and most of Amazonian Colombia, Brazil, Peru, and Bolivia. Its range extends slightly into Paraguay and Argentina and also includes Trinidad.The American pygmy kingfisher inhabits dense forest, where it occurs along small streams and rivers, beside pools, in swamps, and along tidal channels in mangroves. It shuns open landscapes. In elevation it ranges from sea level to.