Concealing-Coloration in the Animal Kingdom
 Concealing-Coloration in the Animal Kingdom: An Exposition of the Laws of Disguise Through Color and Pattern; Being a Summary of Abbott H. Thayer’s Discoveries is a book published ostensibly by Gerald H. Thayer in 1909 and revised in 1918 but in fact a collaboration with and completion of his father Abbott Handerson Thayer's major work.The book illustrated artistically by Abbott Thayer sets out the controversial thesis that all animal coloration has the evolutionary purpose of camouflage.