American Bullfrog
Lithobates catesbeianus
Summary 6
The American bullfrog (Lithobates catesbeianus), often simply known as the bullfrog in Canada and the United States, is an aquatic frog, a member of the family Ranidae, or “true frogs”. This species has traditionally been classified as Rana catesbeiana, however the classification has been changed to Lithobates due to paraphyly in Ranidae. This frog has an olive green back and sides blotched with brownish markings and a whitish belly spotted with yellow or grey. The upper...
Description 7
This frog is the largest in North America and is distinguished by lacking dorsolateral folds and having very large tympanums, larger than the eye in males. The tips of the fingers and toes are blunt. The webbing is well developed. The skin on the back of this species is rough with random tiny tubercles. There is no dorsolateral fold, but there is a prominent supratympanic fold. The mean snout to vent length for males is 152 mm (range 111-178) and for females it is 162 mm (range 120-183). The males have pigmented nuptial pads. The vocal openings are at the corner of the mouth.The dorsum is green, with or without a netlike pattern of gray or brown on top. The venter is slightly white, sometimes mottled with gray or yellow. Coloration varies widely depending on the locality of the bullfrog (Conant and Collins 1975).
See another account at californiaherps.com.
Sources and Credits
- (c) copepodo, some rights reserved (CC BY-NC-ND), http://www.flickr.com/photos/63661371@N00/2838159004
- (c) cyric, some rights reserved (CC BY-NC-SA), uploaded by cyric
- (c) Gabriel Kamener, some rights reserved (CC BY-NC-SA), http://farm3.static.flickr.com/2444/3624958681_3f7e79b8ca.jpg
- (c) 2010 William Flaxington, some rights reserved (CC BY-NC), http://calphotos.berkeley.edu/cgi/img_query?seq_num=187426&one=T
- (c) Carl D. Howe, some rights reserved (CC BY-SA), https://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/North-American-bullfrog1.jpg/460px-North-American-bullfrog1.jpg
- (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Lithobates_catesbeianus
- (c) AmphibiaWeb © 2000-2015 The Regents of the University of California, some rights reserved (CC BY), http://eol.org/data_objects/34272021
More Info
- iNat taxon page
- AMNH Amphibian Species of the World
- AmphibiaWeb
- Animal Diversity Web
- Biodiversity Heritage Library
- BOLD Systems BIN search
- CalPhotos
- Global Biodiversity Information Facility (GBIF)
- HerpMapper
- Maryland Biodiversity Project
- NatureServe Explorer 2.0
- NBN Atlas
- Ninnescah Life
- VertNet
- 日本のレッドデータ検索システム
