Anguilla, Antigua And Barbuda, Argentina, Aruba, Barbados, Belize, Bolivia, Brazil, Canada, Colombia, Costa Rica, Dominica, El Salvador, French Guiana, Guadeloupe, Guatemala, Guyana, Honduras, Martinique, Mexico, Montserrat, Netherlands Antilles, Nicaragua, Paraguay, Peru, St Kitts And Nevis, St Lucia, St Vincent and The Grenadines, Suriname, Trinidad and Tobago, USA (B), Venezuela.
Population
Estimated population is 8,000,000 (2010).
Brown-crested Flycatcher (Myiarchus tyrannulus) [XC796832]
by Paul Driver from Pooks Hill Lodge (near Springfield), Cayo District, Belize (dawn song)
Brown-crested Flycatcher (Myiarchus tyrannulus) [XC821566]
by Guilherme from Ponte dos incapazes, Porto Velho, Rond\u00f4nia, Brazil (call)
Subspecies
Phylogenetic analysis of mitochondrial DNA places this species in a clade with Yucatan Flycatcher (Myiarchus yucatanensis), Great Crested Flycatcher (Myiarchus crinitus) and Ash-throated Flycatcher (Myiarchus cinerascens). It further suggests that Grenada Flycatcher (Myiarchus nugator) (formerly treated as conspecific) together with Caribbean, northern Venezuelan and Colombian populations of present species may warrant separation at species level (as Myiarchus erythrocercus). Also, that remaining populations of South America (nominate subspecies and bahiae) belong to a different clade. That currently recognized subspecies of North and Central America fall into a third clade (that may warrant recognition as Myiarchus cooperi). Morphological diversity among all populations is low. Possibility, nature and extent of any interaction and intergradation in Honduras and El Salvador between cooperi and brachyurus require study. Island taxa cozumelae and insularum weakly differentiated morphologically. Subspecies bahiae reportedly intergrades with nominate. A revision is needed of circumscription of this species and the subspecies within it.
The following 7 subspecies are recognised:
magister Ridgway, 1884 - Southern USA (south-eastern California, southern Nevada and south-western Utah, west, south-central and south-eastern Arizona, south-western New Mexico) and western Mexico (south to Pacific slope of eastern Oaxaca).
cooperi Baird, SF, 1858 - Southern USA (southern Texas) and eastern Mexico (south to interior eastern Oaxaca and east to Quintana Roo) south to northern Honduras.
insularum Bond, J, 1936 - Bay Is (Utila, Bonacca, Roatán), off northern Honduras.
cozumelae Parkes, 1982 - Cozumel I.
brachyurus Ridgway, 1887 - Western Nicaragua and north-western Costa Rica.
tyrannulus (Müller, 1776) - Northern and eastern Colombia and southern Ecuador east to Trinidad and Tobago, the Guianas and mouth of Amazon, and south of Amazonia in northern and eastern Peru, Bolivia, southern Brazil, Paraguay and northern Argentina.
bahiae von Berlepsch & Leverkühn, 1890 - Lower Amazon Basin south through eastern Brazil (south to Sío Paulo) to north-eastern Argentina (Misiones).
BirdLife International Species Factsheet