Chestnut-sided Warbler (Setophaga pensylvanica), Roger Road WRF, Pima County

This Chestnut-sided Warbler was discovered by Will Russell on 21 November 2012 and photographed by Andrew Core the same day.

Chestnut-sided Warbler is a casual transient and winter visitor.

Wingbars, bright green back, habit of cocking tail up and hint of chestnut flanks identify this bird.

21 November 2012, photo by Andrew Core

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