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You should be wary of the cassowary.
If there’s one bird on the list you don’t want to encounter in the wild, it’s the southern cassowary, the largest bird in the cassowary genus. These natives to Australia and Oceana are part of the larger family of ratites—giant birds like emus, ostriches, rheas, and the much-smaller kiwis.
The southern cassowary is known for its territoriality, and when provoked can use its large claws to maim or even kill humans. Part of the fatal blow is attained through their speed, which tops out just a hair over 30 miles per hour. Combine that with a sharp talon and you have a recipe for destruction.