Aviarius is a minor villain from the television show Kim Possible. He is also known as "the Dark Master of the Winged World".
He is an enemy of Team Go with an extensive collection of bird minions and bird-based gadgets such as the "Flamingo of Doom" and the "Heat-Seeking Hummingbirds." His secret lair, "the Nest," lies upon the peak of Go Mountain, just outside of Go City. He imprisoned the Wego twins there and stole their powers in an attempt to lure Shego and Kim Possible (who Aviarius had accidentally transferred the powers of Hego to) to his lair to steal their powers as well and from that point own "the complete set" of Team Go's powers.