Breeding distributions of the four subspecies of Fork-tailed Flycatcher are as follows:
· monachus (Hartlaub 1844): Southern Mexico and Belize to Colombia, Venezuela, and several offshore islands, Surinam and north-central Brazil (Teul et al. 2007, Mobley 2004).
· sanctaemartae (Zimmer 1937): Northern Colombia and northwestern Venezuela (Mobley 2004).
· circumdatus (Zimmer 1937): Northern Brazil (eastern Amazonas and Pará and Amapá states; Mobley 2004).
· savana (Vieillot 1808): Central and southern Brazil, Bolivia, Paraguay, Uruguay, and Argentina (south to the Río Negro; Ridgely and Tudor 1994, Mobely 2004, Marini et al. 2009). Overwinters in Amazonia, a large portion of northern South America (i.e., within the Orinoco River Basin; Jahn et al. 2013), and Trinidad and Tobago, occasionally appearing in the West Indies (Ridgely and Tudor 1994).
Vagrants of the nominate subspecies, and to a lesser extent the subspecies monachus, occur regularly in North America (McCaskie and Patten 1994, Shepherd and Smith 1996). Most of these vagrant sightings occur in fall (September-November) with a lesser number in spring and early summer (May-June)g (McCaskie and Patten 1994).