POTD 5/14/23

May 14, 2023  •  Leave a Comment

ODD COUPLE - A pair of Purple Finches - the reddish colored male and the obviously not-purple female. Sexual dimorphism - when males and females of the same species look very different - often evolves with migration. More than three quarters of migratory birds are dimorphic, while more than three quarters of sedentary species are not.


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