the anhinga, also known as the snakebird, is a large waterbird found throughout warm portions of the americas. they feed by spearing fish or other aquatic prey with their sharp bills. anhingas are social birds that are typically found in flocks, sometimes mixed with similar species like cormorants. they do not have external nostrils, and breathe through the epiglottis. females can be distinguished by a chestnut brown head and neck rather than the glossy black of the male.
A striking Anhinga takes time to preen the feathers while soaking up some sun. Females and juveniles of this species can be distinguished by the tan colored feathers on her neck; adult males of this species are uniformly dark colored.