Showing posts with label Northern Rough-winged Swallow (Stelgidopteryx serripennis). Show all posts
Showing posts with label Northern Rough-winged Swallow (Stelgidopteryx serripennis). Show all posts
Sunday, April 30, 2017

Northern Rough-winged Swallows on the Tuolumne River

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These birds had me fooled last year, but never again (yeah, sure...). The Northern Rough-winged Swallows ( Stelgidopteryx serripennis ) I ...