The Chesapeake Bay Trust has redefined the pocket field guide.

The organization says its new mobile phone application is the first of its kind, providing an ecosystem-based guide to the plants and animals of the nine ecologically distinct regions of the watershed. The app is free and initially available to iPhone and iTouch users.

The application was developed for the Trust by and makes use of the Website’s vast database of U.S. wildlife, both plant and animals. To get the app, go here for a link or visit the Apple Appstore from your iPhone and search Chesapeake Wildlife.