The next best-and only other-reference I know is this article (January, 1984, predicated on 1e lore *) which tells us:

'The Ecology of the Basilisk,' Ed Greenwood, Dragon 81 The Monster Manual tell us that basilisks live in arid, tropical, and temperate climates, and seek sheltered lairs such as caves, often living underground.īasilisks move slowly ('ponderous' predators) and can consume prey they have petrified with their strong jaws.Īnd that's about it.