These are lists of the different types of wildlife found living, breeding or migrating through Massachusetts. Occurrences by county and in the historical record are noted. Unless otherwise noted, the following are merely lists, not identification guides:
- State Mammal List
- State Reptile and Amphibian List
- Massachusetts Bird Checklist
- Guide to Snakes of Massachusetts - an external link to an identification guide containing illustrations and other facts.
- Bat Guide for Homeowners - booklet describing bat species and behavior with tips for people who encounter bats in their home or business and information on preventing access to houses and buildings.
- Fish of Massachusetts - an external link to a list of freshwater fish found in Massachusetts.
- Rare and Endangered Species List
- Rare Species Fact Sheets