At Francis Bay there is a short loop trail with 2 entrances which is great for bird watching. You will also see deer and land crabs.
The Trail begins at the restored stone building. It is a relatively easy 0.3-mile walk with only one small hill. The trail goes through a forest, past ruins and on to the beach at Francis Bay.
It then winds through a mangrove forest and passes by a pond before emerging from the mangroves at the dirt road between the beach entrance and the paved road at Mary’s Creek.
The National Park Service sometimes offers a guided bird watching walk along the trail. The schedule is here:
A guide to the birds of St. John can be found here or you can use the following book:
Bird: The definite Visual Guide
Unrivaled in scope for a single-volume reference work, this visual guide to every bird order and family profiles more than 1,400 species, photographed in their native environment by photographers around the globe. Authoritative, comprehensive, and completely up to date, this is a must-have reference for anyone with even a passing interest in the world’s birds. Illustrates the full range of birds, bird behavior, and bird-watching locations. Organized in taxonomic order with detailed introductions to every bird order. Special double-page features on the most spectacular birds. Breathtaking images of the bird world.