Budgett's frogs,Lepidobatrachus laevis,are highly intelligent but aggressive creatures. The two sharp protrusions in their mouth allow them to attack both prey and predator alike.
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This frog is also known as the Freddy Krueger frog, because when frightened, it will open its disproportionately large mouth and emit a shrill scream. It has even been known to bite when cornered by a human or predator.