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Canadian Amphibian and Reptile Conservation Network - Réseau Canadien de Conservation des Amphibiens et des Reptiles
Step 2B
Key to Families of Anura (Frogs and Toads)

Choose the description that best fits the animal of interest. If none fit go back to step one. A. vertical pupil, no external eardrum, males have external copulatory organ ("tail"), no dorsolateral ridges, British Columbia only Ascaphidae (Tailed Frog Family) one species in Canada: Ascaphus truei (Tailed Frog) B. vertical pupil, small external eardrum, many small warts but no large parotid glands , one black horny 'spade' under edge of each hind foot, no dorsolateral ridges, Western Canada only Pelobatidae (Spadefoot Family) C. squat, relatively short legs, pupil never vertical, external eardrum, rough warty skin, large parotid glands, two hard projections on each hind foot, one larger than the other, no dorsolateral ridges Bufonidae (Toad Family) D. small, slim-waist, relatively long legs, pupil never vertical, external eardrum, may have enlarged toe pads, no parotid glands, no dorsolateral ridges, no larger than 6 cm body length Hylidae (Treefrog Family) E. robust body, pupil never vertical, prominent external eardrum, no enlarged toe pads, no parotid glands, well developed webs on hind feet, may have dorsolateral ridges Ranidae (True Frog Family)

 

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