Family Pelobatidae
-- the spadefoot toads
This family of North American and
Eurasian frogs is strictly terrestrial, except for the aberrant
Bornean genus Nesobia, which differs from the rest in
many ways, including its aboreal proclivities. Most pelobatids
have a hardened tubercle on each hind foot that can be used to
burrow backwards into the soil. Many species spend much of their
lives below ground. Members of the American genus Scaphiophryne
often breed in temporary pools, and their tadpoles develop with
startling speed. The tadpoles of some species manifest two forms:
one specialized to feed on algae, which succeeds better in wet
years, and another specialized to feed on the algae eaters, which
succeeds better in dry years. The genus Pelobates of Europe,
North Africa and the Middle East is very similar to Scaphiophryne.
The remaining seven genera are Asian and contain a number of
highly unusual and little known species.
Malaysian
Leaf Frog (Megophrys nasuta)
Moist montane forests
on the Malay peninsula, Borneo, and adjacent islands provide
the preferred habitat of the Malaysian leaf frog. Like the similar
but unrelated horned frogs of the South American family Leptodactylidae,
these anurans live rather static lives, sitting cryptically among
the leaf litter, awaiting the approach of any creature small
enough to overpower and cram down their spacious throats. As
the rainy season commences, the males position themselves along
streambanks to entice females with loud, metallic honks. The
tadpoles live suspended from the surface, where they filter microorganisms
gathered through a funnel-shaped structure at the top of their
heads.
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