Songbirds from below
How to use body shape to identify songbirds whose field marks aren’t visible
Contributed by David Allen Sibley
Published:
February 15, 2011
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Contributing Editor David Allen Sibley explains how to use body shape, not field marks, to identify songbirds that are viewed from below. Accompanying the article are paintings by Sibley of birds that can be difficult to tell apart where they occur together: Hutton’s Vireo and Ruby-crowned Kinglet. “Fortunately,” Sibley writes, “the two species are distinguished by fundamental differences that can be seen in silhouette.”
Read more about David Allen Sibley »
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