Last night an impressive vocal display from a koala that lasted the longest that I've heard so far. Made me wonder - is it a growl, roar, bray, bellow? None seem to be favoured but my research led me to this National Geographic article. Scientists have discovered that the koala has an extra sound producing organ that enables it to produce a bellow that would otherwise be too low for its size (on a par with elephants). Good recording of koala bellow on this page too.
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December 2020
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