Recently I was in Australia, again enjoying
seeing some of the creatures that are indigenous only to that continent.
Marsupials, for example. According to some sources, true handedness would not
be expected in the average marsupial because these creatures (unlike placental
mammals) lack a corpus callosum. In the wild, however, kangaroos favor
left-handedness for everyday tasks. Studies showed this was especially true for
red kangaroos and eastern gray kangaroos. Bennett’s wallabies, showed
left-handed use for activities that required fine manipulation and right-handed
use for activities that required physical strength. I
was interested to learn that chickens (definitely not marsupials) seem to favor
the left eye when it comes to social recognition tasks. Toads reportedly favor the right front
foot when it comes to removing stuff stuck to their bodies. And more polar bears appear to be left-pawed than
right-pawed. Hmm-m.
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