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RT @xenocanto: free e-chapter about bird song in free e-book about birds! Recommended! https://t.co/XzyEZAZph8
RT @xenocanto: free e-chapter about bird song in free e-book about birds! Recommended! https://t.co/XzyEZAZph8
RT @certhia2007: Three major bird clades (passerines, parrots, hummingbirds) comprise particularly smart birds: They can learn their langua…
RT @certhia2007: Three major bird clades (passerines, parrots, hummingbirds) comprise particularly smart birds: They can learn their langua…
RT @certhia2007: Three major bird clades (passerines, parrots, hummingbirds) comprise particularly smart birds: They can learn their langua…