- Butorides
Taxobox
name = "Butorides"
image_width = 200px
image_caption = Green Heron
regnum =Animal ia
phylum = Chordata
classis = Aves
ordo =Ciconiiformes
familia =Ardeidae
genus = " Butorides"
genus_authority = Blyth, 1852
subdivision_ranks = Species
subdivision = "B. virescens"
"B. striatus"
"B. sundevalli""Butorides" is a genus of small
heron s. It contains three similar species, theGreen Heron or Green-backed Heron, "Butorides virescens", theLava Heron ("Butorides sundevalli"), and theStriated Heron , "Butorides striatus". Afossil species, "Butorides validipes", is known from theEarly Pleistocene ofFlorida .Adults of both extant species are about 44 cm long, and have a blue-black back and wings, a black cap and short yellow legs. Juveniles are browner above and streaked below, and have greenish-yellow legs.
The species have different underpart colours, chestnut with a white line down the front in Green Heron, and white or grey in Striated. Both breed in small wetlands on a platform of sticks often in shrubs or trees, sometimes on the ground. The female lays 3 to 5 eggs. Both parents incubate for about 20 days until hatching, and feed the young birds which take a further 3 weeks to fledge.
"Butorides" herons stand still at the water's edge and wait to ambush prey. They mainly eat small
fish ,frog s and aquaticinsect s. They sometimes drop food on the water's surface to attract fish.Taxonomy and range
The "Butorides" herons were formerly considered one species, but are now normally split as above, with the Green Heron breeding in eastern
North America ,Central America , theWest Indies and thePacific coast ofCanada and theUnited States , and Striated Heron in theOld World tropics from westAfrica toJapan , and inSouth America .Birds in central
Panama with buff necks have been considered as hybrids between the two species, but the occurrence of similar birds beyond the range of migratory Green Herons means that there is still doubt about the species' limits of the "Butorides" herons.References
* "A guide to the birds of Costa Rica" (1989), by F. Gary Stiles and Alexander Frank Skutch ISBN 0-8014-2287-6
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