Some gnus and a zebra in Ngorongoro Crater, Tanzania.
Gnus (wildebeest) and zebras are nearly always found together.
The zebras have keener senses and act as lookouts for the gnus,
while the gnus give the zebras the protection of a large herd.
Gnus are funny to watch because they are likely to suddenly
run off, jump in the air and prance about like they're crazy!
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