Vireos (Vireonidae)

Warbling Vireo (Vireo gilvus) - HBW 15, p. 429

French: Viréo mélodieux German: Sängervireo Spanish: Vireo Gorjeador
Other common names: Eastern Warbling Vireo (gilvus); Western Warbling Vireo (swainsoni, brewsteri, victoriae, sympatricus)

Taxonomy: Muscicapa gilva Vieillot, 1808, New York State, USA.
Sometimes placed in a separate genus, Melodivireo. May form a superspecies with V. leucophrys, and often considered conspecific, but the two differ in plumage and some vocalizations. Nominate race has been treated as representing a single monotypic species, the other four races together forming a separate species, on basis of an alleged degree of reproductive isolation of the two taxa in overlap zone in S Canada (Alberta); further study required. Proposed race leucopolius, described from W USA (Warner Mts, in SE Oregon), considered synonymous with swainsoni; pet.. View all taxonomy...

Taxonomy: Muscicapa gilva Vieillot, 1808, New York State, USA.
Sometimes placed in a separate genus, Melodivireo. May form a superspecies with V. leucophrys, and often considered conspecific, but the two differ in plumage and some vocalizations. Nominate race has been treated as representing a single monotypic species, the other four races together forming a separate species, on basis of an alleged degree of reproductive isolation of the two taxa in overlap zone in S Canada (Alberta); further study required. Proposed race leucopolius, described from W USA (Warner Mts, in SE Oregon), considered synonymous with swainsoni; petrorus (from Wyoming, in USA) and connectens (from Chilpancingo, in Guerrero, in SW Mexico) both subsumed in brewsteri. Five subspecies recognized.

Subspecies and Distribution:

  • swainsoni S. F. Baird, 1858 - breeds from SE Alaska and W Canada (S from S Yukon, SW Mackenzie region and W Alberta) S in W USA (E to N Montana) to SW California; migrates to W & S Mexico, Guatemala, Honduras and W Nicaragua.
  • brewsteri ( Ridgway, 1903) - breeds Rocky Mts from SW Montana and S Idaho S through SW Texas to W Mexico (S to SC Oaxaca); winters in Mexico.
  • victoriae Sibley, 1940 - breeds Cape region of Baja California (W Mexico); wintering area unknown.

     See all 5 subspecies
  • swainsoni S. F. Baird, 1858 - breeds from SE Alaska and W Canada (S from S Yukon, SW Mackenzie region and W Alberta) S in W USA (E to N Montana) to SW California; migrates to W & S Mexico, Guatemala, Honduras and W Nicaragua.
  • brewsteri ( Ridgway, 1903) - breeds Rocky Mts from SW Montana and S Idaho S through SW Texas to W Mexico (S to SC Oaxaca); winters in Mexico.
  • victoriae Sibley, 1940 - breeds Cape region of Baja California (W Mexico); wintering area unknown.
  • sympatricus ( A. R. Phillips, 1991) - C Mexico (N & EC Puebla).
  • gilvus ( Vieillot, 1808) - breeds S Canada (C Alberta E to extreme SW Ontario and New Brunswick) and USA (E from N Montana, S to S Oklahoma, Louisiana and Virginia); migrates to Central America.