Images of adult male (A) <i>Dryocopus galeatus</i>, (B) <i>Dryocopus lineatus erythrops</i> and (C) <i>Campephilus robustus</i>. Although highly similar in appearance ...
Visual mimicry lets the helmeted woodpecker (Dryocopus galeatus) live on the threatened Atlantic forest turf of two bigger birds -- the lineated Dryocopus lineatus and robust (Campephilus robustus) ...
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