Beeneran

Beeneran is an enemy from Mega Man Zero 4. It appears in the Underground Forest (Noble Mandrago's stage) and its growth changes with the weather. It attacks by opening up its bulb and releasing a swarm of bees at Zero. 

PetitNet
PetitNets are the bee Mechaniloids released by Beeneran. They don't drop parts or E-crystals.