Birds

Cassowaries are birds that have actual confirmed human kills. There are even cases where a human has attempted to kill one only to end up dead.

Due to the extremely intelligent act of certain humans, in certain areas, cassowaries expect to be fed. If you don't feed them, they will attack you.

They're easily capable of disemboweling you with a single slash.

Unsurprisingly, they are giant monsters, capable of reaching a height of 2 m and a weight of 90 kg. They will outrun you and can also out jump you.