Queen of Bombus terrestris    Queen in box for nesting    Young nest    Box for nesting (side view)    Box for nesting (top view)    Box for nesting (close view)    Honey pots    Queen heated eggs    Workers and cocoons    Workers feed of larvas    Larvas produce cocoons    Larvas done cocoons    Nest in box    Roof of nest for saving temperature    Young queens    Copulation in laboratory