Black-throated Green Warbler (Dendroica virens) Science Article 4
We studied the ecological distribution and foraging behavior of three speciesin the Black-throated Green Warbler (Dendroica virens) species group in the Eastern Highlandsof Chiapas, Mexico. The three species, Black-throated Green, Hermit (D. occidentalis)and Townsend’s (D. townsendi) Warblers are largely allopatric on the breeding grounds andvariably sympatric during the winter. We surveyed the composition of 166 mixed-speciesflocks and recorded habitat variables associated with the flock location along an elevationaltransect.
RUSSELL GREENBERG et al., The Condor 103:31-37