Erika and I found this Great Blue Heron on Capitol Lake in Olympia on 30 April 2019. I have seen this heat-regulating behavior a few times. I assured passersby that the bird was not wounded. Other herons have similar behavior in which the birds make a shadow that attract unfortunate minnows within striking distance. That behavior, however, has a more horizontal aspect. The linked photo is of a heron on dry land, and this bird is casting a fairly scant shadow.
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