Jailbird is the supervillain identity of Snake Jailbird.
After superheroes had been outlawed in Springfield, supervillains started ruling the town. Since this happened, all the good places to rob had been robbed already. Jailbird and the Human Scumbag decided to rob a PTA meeting as a result. During the meeting, Bart, Lisa, and Maggie put on their super suits and announced themselves as supervillains, to get around the law. The three of them pretended to attack civilians but ended up defeating the Human Scumbag and Jailbird instead.
Behind the Laughter
Jailbird is a parody of Vulture from Marvel Comics.