Part of the reason the basilisk is referred to as "king of serpents" is the crown-shaped crest it supposedly sports atop its head. It may also be known as a "king" out of fear. Basilisks supposedly have the ability to kill any creature instantly with a glance. Anyone that looks a basilisk directly in the eye will immediately keel over dead. As well as its deadly stare, basilisks supposedly ooze venom from their bodies and leave a trail of it wherever they go. Basilisk territory can be readily identified by dead animals and plants surrounding its lair, killed off by the creature's potent venom.
Supposedly, the basilisk's weakness is the odour of the common weasel. It seems that the stench of weasel urine is fatal to the basilisk.
- In the book Harry Potter And The Chamber Of Secrets a basilisk appears, blinded by a Phoenix so Harry can kill her.
- It is possible that basilisks are a unknown type of massive snake.
- The cockatrice is similar to the basilisk in many ways, although it possesses both reptilian and avian features.
- One theory is that it is a dragon-anaconda hybrid, hence the draconic head and snake body.