From the U.S. Fish and Wildlife Service's online digital media library.
Check http://images.fws.gov/ for higher quality version.

Metadata
Title: anhinga
Alternative Title: Anhinga anhinga
Creator: Hines, Robert W.
Publisher: U.S. Fish and Wildlife Service
Contributor: DIVISION OF PUBLIC AFFAIRS
Language: EN - ENGLISH
Rights: (public domain)
Audience: (general)
Subject: line art, bird, birds, water bird, black and white, illustration, art, artwork, animal, wildlife
Date Issued: May 30 2002