Robert Clarkのインスタグラム(robertclarkphoto) - 10月23日 00時32分

@Robert Clark The Jacobin Pigeon. This pigeon is a variation on the common rock dove (Columba livia) bred by pigeoners to have a feathered collar and puffed chest that is apparent in this photo. #Pigeonry was a craft that Darwin liked to take part in order to prove that you could accentuate the effects of #variation that come about in #evolution. Since pigeons reach maturity so fast, it’s relatively simple to #select for certain traits, eventually enough such that the breed looks nothing like the pigeons you see in the park.

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