Bolivian Tyrannulet (Zimmerius bolivianus) [XC510496]
by Niels Krabbe from Florida, Departamento de Santa Cruz, Bolivia (call)
Bolivian Tyrannulet (Zimmerius bolivianus) [XC778835]
by Niels Krabbe from Cochabamba: Tablas Monte road 6, Bolivia (call)
Subspecies
No subspecies.
Despite superficial resemblance to Phyllomyias, genus appears to be more closely related to Phylloscartes. Birds from central and southern Peru named as subspecies viridissimus, on average perhaps slightly yellower below than those in Bolivia, but individual and age-related variation in this character appears greater than any detectable geographical difference.