The Zubbas are a gang of black and yellow hornets and are minor villain in both Banjo Kazooie, and Banjo-Tooie.
In Banjo-Kazooie, they are protecting a Jiggy in their nest in Click Clock Wood for Gruntilda and will attack any suspicious bears and birds that attempt to get it. Banjo and Kazooie must fend off swarms of Zubbas using the Rat-a-tat Rap to win the Jiggy. Alternately, you can just whip out the Wonderwing and let them ram you while invincible.
In Banjo-Tooie, the Zubbas fly around Cloud Cuckooland and attack Banjo and Kazooie with their stingers if they get close. The Zubbas also have a mini-game for the bee in which you try to shoot as many different-colored Zubbas as you can to score points.