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Bay Field Guide

The Bay Field Guide profiles many of the plants and animals that live in the Chesapeake Bay watershed. Explore the Field Guide to learn about more than 200 species of algae, bay grasses, birds, fish, insects, invertebrates, mammals, plants and trees, and reptiles and amphibians. Each month, the Field Guide grows as we add a new Critter of the Month.

You can browse the Field Guide by type of critter or by habitat. You can also click on the images below to explore some of the newest and most popular species in our Field Guide.

Critter Of The Month

Northern Pike
Esox lucius

The northern pike is a dark green fish whose range extends farther than that of any other freshwater gamefish.


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