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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