This chart was compiled by Megan Kane using frog length data from the Vermont Reptile and Amphibian Atlas Database in July of 2013. The length of a frog is measured from snout to vent. These frogs were organized by average length, and include the largest 10% for most species. For species with sample sizes over 1000, the largest 1% were included. Those species are marked with an asterisk after the species name. Due to a lack of data on Fowler’s Toads and Boreal Chorus Frogs, we included average lengths and records from Conant and Collins (1998).
The lengths in the left numerical column are those you would expect for mature adults of these species in Vermont. The right numerical column shows the number of individuals that made up the sub-sample for that species. The lengths in the middle are those for the largest, reliably-documented frog of that species from Vermont. Can you document a larger one?
|Length Data for Adult Vermont Frogs
Measured in inches from snout to vent
|Species||Average Length (inches)
of Large Adults (top 10%)
|Longest Reported in Vermont||Number in Sample||Person(s) Who Recorded Longest|
|Spring Peeper||1.3||1.5||86||Kir Talmage and Betina Mattesen|
|Boreal Chorus Frog||1.4||1.5||0||Conant and Collins 1998|
|Wood Frog||2.3||3.1||28||Danielle Wasserman|
|Gray Treefrog||2.4||2.8||8||Mike Sweatt and Thomas Pomfret|
|Pickerel Frog||2.5||3.0||34||Zach Golden|
|Fowler’s Toad||3.0||3.8||0||Conant and Collins 1998|
|Mink Frog||3.1||3.4||2||Kyle von Hasseln and Liz Rolerson|
|Northern Leopard Frog*||3.3||4.7||41||Kate Willard|
|Green Frog*||3.9||4.7||22||Jake Maddocks|
|American Toad*||4.1||4.4||13||Maureen Rice and Colleen Jones|
|American Bullfrog||5.8||6.7||6||James Andrews|
* For this species, as the sample sizes were over 1000, the largest 1% were included.
Conant, R. and J.T. Collins. 1998. A field guide to reptiles and amphibians of eastern and central North America. Third Edition, expanded, Houghton Mifflin Company, Boston Massachusetts.