Cassin's Kingbird
Tyrannus vociferans
Observed in Sycamore-Cottonwood woodland along the Sta Cruz River, Sta. Cruz Co., Arizona, USA. Aug. 2010.
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The raucus call of Cassin's Kingbirds from the highest perches in the trees above watered canyons in southern Arizona is a sure sign of summer. As flycatchers they maintain an alert, upright posture for hunting flying insects. Their tails lack the white outer feathers of the similar-looking Western Kingbird.