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Wetmore, Alexander, 1886-, et al. / Warm-blooded vertebrates
(1931)

Chapter III: color and its arrangement,   pp. 25-38 PDF (5.6 MB)



PLATE 12
Flicker (Colaptes auratus luteus) at nesting hole. The bird rests in
typical woodpecker manner, clinging with sharp claws and bracing
with stiffened tail. Photograph by Dr. Frank N. Wilson


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