Raising monarchs inside
Raising monarchs in aquariums
Why do this? For one thing, of course, it's fascinating!
For another, though, it's a way to maxmize the number of eggs that actually turn into butterflies.
I've read estimates that only 5-10% of the eggs laid survive to butterflyhood.
Parasitism, predation, weather, even milkweed latex all take their toll.
Of course, low survival rates are common with insects—we'd be overrun with insects if every insect egg laid actually survived to adulthood.
Here's more on how we raise monarchs.
Many prefer pupating on the top screen
But virtually all the problems monarchs are encountering are new and human-caused: loss of habitat in general, loss of milkweed specifically, climate change, as well as illegal logging and general turmoil in Mexico's overwintering areas.
Although I may have saved some individual monarchs by raising them from eggs, the ultimate solution is not raising them, but creating habitat in the wild: i.e. planting milkweeds!
They don't all survive
They don't all survive. Perhaps these two had a parasite.
All in all, though, we've had only a miniscule number that haven't become beautiful, healthy butterflies.
Here's a stinkbug nymph dragging away a caterpillar it has killed. I was wondering why my daily caterpillar count was decreasing! Now I'm checking the leaves before I bring them in.
This shows the scale of the stinkbug, and thus the caterpillar it attacked. There's a lot of drama in this small world.