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

Metadata
Title: king rail
Alternative Title: Rallus elegans
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: birds, bird, wading, animal, animals, illustration, illustrations, artwork, line art, rails
Date Issued: June 04 2002