National Audubon Society field guide books have gone mobile, putting the most authoritative and comprehensive information about the natural world at the fingertips of iPhone and iPod Touch users. (Graphic: Business Wire)
This Tennessee Warbler call is one of more than 2,300 bird sounds included in the Audubon Guide apps for the iPhone and iPod Touch.
Audubon Guides provide a wealth of interactive information in a mobile package, giving nature lovers and outdoor enthusiasts a fun and exciting experience that makes outings richer, more informed and instantly sharable. (Graphic: Business Wire)