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 Largest 10% of Adult Frogs in Vermont Measured in inches from snout to vent |
||||
|---|---|---|---|---|
| Species | Average Adult Length | Longest Reported | Sample Size | 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 |
| Mink Frog | 2.4 | 2.6 | 2 | James Andrews and Take PART |
| 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 |
| 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.
Work cited:
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.
