Herp Atlas 1992-1998 Survey

• The map below shows the distribution of the American Bullfrog in Massachusetts based on the original intensive volunteer survey that took place from 1992-1998.
• Download pdf of map

Updated Distribution Map

• View interactive map showing an updated distribution based all records received to date, including sightings submitted via this site.
• Report your own sighting

Lithobates catesbieanus

Our largest frog, the bullfrog has a voice to match both its size and its name. Heard individually it is easy to detect the familiar “chug-o-rum” call of the male bullfrog. A dense chorus of bullfrogs can sound like an agitated herd of cattle. Bullfrogs chorus in late-spring and early summer from marshes, ponds, river backwaters and the weedy margins of lakes.