Tyrant-flycatchers (Tyrannidae)

Sirystes (Sirystes sibilator) - HBW 9, p. 427

French: Tyran siffleur German: Grauschopftyrann Spanish: Mosquero Silbador
Other common names: Eastern Sirystes (races E of Andes); Western Sirystes (albogriseus)

Taxonomy: Muscicapa sibilator Vieillot, 1818, Río Plata, Paraguay.
Affinities obscure. Placed by early authors in the family Cotingidae, but internal morphology (syrinx, nasal capsule) and nesting behaviour indicate that it is allied with “myiarchine” flycatchers in the genera Rhytipterna, Casiornis and Myiarchus. Race albogriseus sometimes treated as a separate species, differing in plumage and vocalizations. Five subspecies recognized.

Subspecies and Distribution:

albogriseus (Lawrence, 1863) - E Panama; NW Colombia (Chocó, E Antioquia, Córdoba) and NW Ecuador (locally in W Esmeraldas, S Pichincha and N Manabí).
albocinereus P. L. Sclater & Salvin, 1880 - SW Venezuela (W Barinas, Táchira), E Colombia (locally to near base of Andes), E Ecuador, E Peru, W Brazil and N Bolivia (S to La Paz, Cochabamba and N Santa Cruz).
subcanescens Todd, 1920 - Surinam, French Guiana and E Amazonian Brazil (E to Maranhão, S to Mato Grosso and N Goiás).

See all 5 subspecies

albogriseus (Lawrence, 1863) - E Panama; NW Colombia (Chocó, E Antioquia, Córdoba) and NW Ecuador (locally in W Esmeraldas, S Pichincha and N Manabí).
albocinereus P. L. Sclater & Salvin, 1880 - SW Venezuela (W Barinas, Táchira), E Colombia (locally to near base of Andes), E Ecuador, E Peru, W Brazil and N Bolivia (S to La Paz, Cochabamba and N Santa Cruz).
subcanescens Todd, 1920 - Surinam, French Guiana and E Amazonian Brazil (E to Maranhão, S to Mato Grosso and N Goiás).
atimastus Oberholser, 1902 - Chapada, in Mato Grosso (Brazil).
sibilator (Vieillot, 1818) - E & SE Brazil (Goiás and Bahia S to Rio Grande do Sul), E Paraguay (E from Amambay and Paraguarí) and NE Argentina (Misiones, NE Corrientes).