The African clawed frog (Xenopus laevis, also known as the xenopus, African clawed toad, African claw-toed frog or the platanna)
These “flat frogs” live in natural water-bodies, but you
might see them in your garden pond. They also don’t mind living in the local
sewerage works. At the end of the rainy season, they bury themselves under wet
mud, where they hibernate until the next rains.
Common platannas feed in the water on any living creatures
they can overpower. Their prey includes frogs and tadpoles (including their own
kind), insects and other invertebrates (mosquito larvae are consumed by young
frogs), small fish, young birds and mice that fall into the water. They even
feed on carrion in the water.
In the 1930s, it was discovered that a female common
platanna would spawn if injected with the urine of a pregnant woman (the
hormone chorionic gonadotropin being the active ingredient). In the 1940s and
‘50s, this was the only available pregnancy test and many hospitals around the
world kept and bred platannas so that they could perform such tests.
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