Lepidopterra

Lepidopterra is the home planet of Lepidopterrans, Stinkfly's race. With its advanced and highly specialized ecosystem, Lepidopterra is a generally peaceful swamp planet whose numerous species live among a fantastic variety of giant plants. Residing in a complex of giant hives each ruled by it's own queen, Lepidopterran are the predominant inhabitants of this planet. Life on this planet is seasonal, and every species does its part to make sure the flora continues to produce it's fruit so that all can live together in harmony as they have for countless years

Reference

 * From Ben 10 Wiki