Tricky facial feathers
How your line of sight can change how dark or pale a bird’s feathers appear
Contributed by David Allen Sibley
Published:
August 26, 2011
Contributing Editor David Allen Sibley tells how the tiny feathers located between a bird's eye and bill differ from other feathers, and he explains how your line of sight can change how dark or pale the feathers appear. Sketches by Sibley show two views of a Warbling Vireo, a species whose identification relies on accurate assessment of the darkness of the loral feathering.
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