Sulphur-rumped Tanager (Heterospingus rubrifrons) - HBW 16, p. 257
French: Tangara à croupion jaune
Spanish: Tangara Lomiazufrada
Taxonomy: Tachyphonus rubrifrons Lawrence, 1865, Lion Hill Station, Panama.
Molecular data indicate genus is closest to Hemithraupis and Chrysothlypis. May form superspecies with H. xanthopygius; often considered conspecific, but differs in morphology and plumage. Monotypic.
Distribution: Caribbean slope from Costa Rica (Limón) E to NE Panama (E to Puerto Obaldía, in San Blas); locally on Pacific slope of Panama in Veraguas (sight) and Panamá (Cerro Jefe and Cerro Azul), possibly also in extreme W Darién.
- Least Concern
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