A cockatrice head is a very rare drop from cockatrices, which require level 25 Slayer to kill. It can be mounted in player-owned houses in the skill hall at level 38 Construction, or turned into a minitrice pet. Both methods are one-time uses and the head cannot be reclaimed.
If players wish to have the cockatrice head mounted, it must be taken to the taxidermist in Canifis. She will charge 2,000 coins and turn it into a stuffed cockatrice head. They can then mount it in their player-owned house using 2 teak planks.
If players wish to make a minitrice pet, they must take it, either stuffed or unstuffed, to the Nomad at Soul Wars who will take it and 25 zeal points away from them and give them a minitrice which will go into the pet interface like most other pets. The minitrice can be fed limpwurt roots.
^Wearing the Mask of Stone or the Helm of Petrification increases the drop rate of this item to 1/500. With at least tier 1 luck drop rate is increased to 1/970; or 1/485 with tier 1 luck and Mask of Stone/Helm of Petrification