‘Solitary’ Vireo (almost certainly Cassin’s) at Creekside Park

Noah Arthur

Numbers and diversity of migrants is picking up at Albany Hill and Creekside Park; early this afternoon a probable CASSIN’S VIREO was there along with WILSONS, TOWNSENDS, YELLOW, ORANGE-CROWNED, and AUDUBONS WARBLERS. 
The Vireo was in the willows along the creek about 500 feet down the trail from Pierce St, a little ways past the Mourning Warbler spot and near the second fence bend. Most of the expert opinions from the several very good birders I have texted the photos to agree it’s a Cassin’s, except for one dissenter who is in favor of Blue-headed, and who is familiar with that species in the East...
Noah Arthur (Oakland)

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