Field Guide

The virile crayfish is large, reddish brown or green, and lacks prominent markings. The pincers are green with orange tips and are studded with whitish knobs. Paired dark blotches run along the abdomen. This species is widespread.

The fatmucket was a favorite species harvested for the button industry in the early 1900s.

When a floater dies, this large mussel with a thick shell will actually rise to the water surface and float as it decays.

The mapleleaf spawns in the summer, using catfish as a host.

Unlike most other freshwater mussels, this species is hermaphrodic: An individual mussel can be both male and female.

A large dorsal wing and purple lining make identification of this widespread mussel easy.

This species enjoys the same geographic distribution in our state as the pink heelsplitter, and it generally resembles that species, too. But as the name suggests, the pink papershell usually has a thinner shell and is smaller. Also, it prefers rather shallow water with a good current.

Shaped like a checkered gunstock, with its unique, turned-down edge, pistolgrips are easy to identify.

The plain pocketbook is one of the most common and widespread mussels in our state. It is oval, relatively large, and occurs frequently.