Well, these bees hang out at that hole, and they wait for that mother to fly away, they go in, eat the egg, and lay their own egg there. So they don't do any work.
穴の中にいるミツバチは 卵を産んだ母親が飛び去るのを 待って卵を食べてしまいます そして卵を産み付けます まるで ただ乗りです