because they need to get food.
Most butterflies don't lay their eggs in garbage. They typically lay their eggs on the plant that their caterpillars will feed on. Monarchs butterflies lay their eggs on milkweed plants. Spicebush swallowtails butterflies lay their eggs on Spicebush, Sassafras, Sweet Bay, and Prickly Ash. You get the idea. I don't know of any butterflies that lay their eggs in garbage, but if they do it is probably the type of garbage that their caterpillars would feed on.
No, the male flies do not lay eggs. Female flies are larger than male flies. The female flies lay over 900,000 eggs during their lifespan.
Many animals lay their eggs and leave them - eg the salmon, sea turtles, butterflies. Other animals eg the cuckoos lay their eggs and leave them to other animals to rear.
You should know this, but if you don't, butterflies lay eggs on leaves. They are so smart, they know where to put their eggs. If the butterflies doesn't know and puts it in a random leaf, that could be a problem.
All of them.
summer
Butterflies, like nearly all insects, lay eggs.
butterfly fish reproduce by laying eggs in the sea
during spring to summer
Many species of butterflies lay about 400 eggs. Some lay many more. Only 1 or 2 out of 100 eggs live to become adult butterflies.
Butterflies don't lay eggs! You stupid n'ers!
Butterflies don't lay eggs! You stupid n'ers!