Tuesday, June 14, 2016

Anhinga

Anhingas spend a lot of time under water. They have dense bones and wettable feathers to facilitate underwater travel. Being under water so long, they face thermal challenges. They spend hours warming themselves, like this one at Florida's St. Marks National Wildlife Refuge. In fact, this dependence on solar radiation limits the Anhinga to the coastal plain of the southeast, and on south through coastal Mexico and South America (Frederick and Siegel-Causey 2000). See my 2011 post for more information on Anhingas.

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