The field guide shows a match the great basin gophersnake pituophis catenifer deserticola to identify snakes of this species it can sometimes be helpful to know about their possible behaviors in response to potential predators the book mentions that these snakes sometimes behave in a way that makes them seem much more dangerous by flattening out their heads puffing up their bodies and . A field guide to mammal tracking in north america by jim halfpenny is a classic guide that led to many advances in animal tracking while the guide doesnt contain color photos of tracks there is a valuable scientific approach to identifying tracks that has very practical applications he also covered gaits and animal movements in the most comprehensive manner at the time while there are
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