John Carlson of Prairie Ice has images and a write-up of a hybrid Great Sage-grouse/Sharp-tailed Grouse. This makes me think about the biological species concept and the inherent fuzziness of species. We like to think of species has completely distinct, but nature is much blurrier than we would like to believe. This bird is currently on the lek, and engaging in an eclectic mix of sage-grouse and sharp-tailed behaviors….very strange indeed.
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