Argentina, Belize, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, El Salvador, French Guiana, Guatemala, Guyana, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Suriname, USA, Venezuela.
Population
Estimated population is 500,000 - 4,999,999 (2010).
Collared Forest Falcon (Micrastur semitorquatus) [XC580453]
by Kent Livezey from Santa Rita do Novo Destino, Goi\u00e1s, Ch\u00e1cara Jayrson, Brazil (song)
Collared Forest Falcon (Micrastur semitorquatus) [XC589726]
by Brice de la Croix from Centro de Experimentos Florestais, Itu, S\u00e3o Paulo, Brazil (call)
Subspecies
Sometimes, especially in past, considered to include Buckley's Forest-falcon (Micrastur buckleyi).
The following 2 subspecies are recognised:
naso (Lesson, R, 1842) - North-central Mexico (Sinaloa to Tamaulipas) south through Central America to northern and western Colombia and Ecuador.
semitorquatus (Vieillot, 1817) - Eastern Colombia east to the Guianas, and south through eastern Peru, northern and eastern Bolivia and Brazil to Paraguay and northern Argentina.