Black-headed pythons, like other python species, are non-venomous, and kill their prey by coiling around it to suffocate it, and then swallowing it whole. Snake cannibalism is not unheard of.

Cannibalistic black-headed python devours its own kind alive. Conservationist captures one python eating another He stumbled across the rare sight at a QLD sanctuary ...

Cops Say Men Stole Black-Headed Python, Lizard from Pet Shop, Brought Snake McDonald's Parking Lot, Began Wrestling with It.