Cockatrice

The cockatrice is a small avian magical beast. Any creature that a cockatrice bites can be permanently turned to stone. A cockatrice is not particularly intelligent, and is always neutral in alignment.

Physical Description
A cockatrice has the head and body of a male chicken, bat wings, and the long tail of a lizard.

Pyrolisk
The pyrolisk is a similar creature, though instead of petrification, it can cause other creatures to burst into flame.