ceries are fascinating flightless birds often dubbed killer birds there are only three species found in Australia Papua New Guinea and Indonesia thriving in tropical forests they primarily eat fruit with bright blue heads and striking eyes cassowaries are captivating females lay large green eggs usually four to five and leave the males to incubate them however cassowaries can be aggressive the southern CA or double waddled CA is known for attacks on humans they have strong Claws and can jump up to 2 m many think cassowaries are harmless and try to feed them leading to dangerous encounters despite their beauty these birds are the most aggressive in the world admire them from a safe distance