Tyrant-flycatchers (Tyrannidae)

Panama Flycatcher (Myiarchus panamensis) - HBW 9, p. 433

French: Tyran du Panama German: Panamaschopftyrann Spanish: Copetón Panameño

Taxonomy: Myiarchus panamensis Lawrence, 1860, Atlantic slope of Canal Zone on Panama Railroad, Isthmus of Panama.
Formerly treated as a race of M. ferox, but the two differ in vocalizations and do not respond to playback of voice of each other; similarly, species-level separation from M. venezuelensis argued on basis of sympatry in extreme NW Venezuela (near Cerro Alto del Cedro) and in N Colombia (Cansoma, in Bolívar). Analyses of morphological characters and mitochondrial DNA indicate close affinities with those two species and also with M. phaeocephalus, but precise relationships within that group unclear. Careful ecological and genetic study in zones of parapatry and sympatry wo.. View all taxonomy...

Taxonomy: Myiarchus panamensis Lawrence, 1860, Atlantic slope of Canal Zone on Panama Railroad, Isthmus of Panama.
Formerly treated as a race of M. ferox, but the two differ in vocalizations and do not respond to playback of voice of each other; similarly, species-level separation from M. venezuelensis argued on basis of sympatry in extreme NW Venezuela (near Cerro Alto del Cedro) and in N Colombia (Cansoma, in Bolívar). Analyses of morphological characters and mitochondrial DNA indicate close affinities with those two species and also with M. phaeocephalus, but precise relationships within that group unclear. Careful ecological and genetic study in zones of parapatry and sympatry would be rewarding. Re-examination of geographical distributions of these taxa and their ecology and taxonomy, especially S & E of L Maracaibo (W Venezuela), is warranted. Two subspecies recognized.

Subspecies and Distribution:

  • actiosus Ridgway, 1906 - Pacific coast of Costa Rica (Gulf of Nicoya S to point N of Osa Peninsula).
  • panamensis Lawrence, 1860 - extreme SW Costa Rica (Rincón de Osa, Puerto Jiménez), Panama (Caribbean slope in W Bocas del Toro and from N Coclé E to San Blas, lowlands and foothills on Pacific coast, also Pearl Is, Coiba I, Taboga I and other smaller islands), N & W Colombia (E to Guajira Peninsula, S to Tumaco, in SW Nariño, lower Cauca Valley and upper Magdalena Valley at least to Neiva and Villavieja) and Maracaibo region of NW Venezuela.