- Busarellus nigricollis
- White head tinged with buff, black shaft streaks on crown
- Bright cinnamon rufous body, including mantle (paler on chest)
- Black crescent on upper breast
- Back has scattered black shaft stripes
- Black flight and tail feathers
- Base of tail barred with rufous
- Bright reddish brown eyes
- Black cere and bill
- Bluish white legs
Immature - similar, blotched with black, including on the crown. Rufous barring on tail is more extensive; pale area on the chest is also more clearly marked. Barring on upper surface of the wings. Brown eyes
Central and South America
Central America: Mexico, Guatemala Belize, El Salvador, Honduras, Nicaragua, Costa Rica, Panama, Trinidad, Tobago
South America: Colombia, Venezuela, Guyana, Suriname, French Guiana, Ecuador, Peru, Bolivia, Brazil, Paraguay, Argentina
There are 2 subspecies:
- B. n. nigricollis:
- B. n. leucocephalus:
Near water in forested areas as well as palm swamps; flooded rice fields, mangroves. Occasionally,also in more open areas.
A large tree is used for nesting, usually associated with water. The nest is lined with leaves. The clutch consists of 3-5 dull white eggs, spotted and speckled pale yellow-brown or red-brown.
The diet includes fish, water bugs and occasionally lizards, snails and rodents.
- Clements, JF. 2009. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2009. Ithaca: Cornell Univ. Press. ISBN 978-0801445019.
- BirdForum Opus contributors. (2021) Black-collared Hawk. In: BirdForum, the forum for wild birds and birding. Retrieved 17 April 2021 from https://www.birdforum.net/wiki/Black-collared_Hawk