This is more a story of the Monarch Butterflies that I have been raising from small Monarch Caterpillars. These are beautiful but here they are plagued with many dangers from caterpillar to Butterfly.
I followed one around the garden and in the last photos, it is pursued by a paper wasp. The Butterfly got away but this particular Monarch butterfly was a female laying her eggs on my Swan plant (a type of milkweed) and so when she left the paper wasp eats the eggs or lays paper wasp eggs inside an older monarch caterpillar and the young wasps eat the caterpillar and it dies. The paper wasp also eats small caterpillars as well.
They are a plague around here. I would love to get rid of them but you have to find the paper wasps nest. I saw another solution in the garden centre today. A container with sweet sugar water which traps the paper wasp and flies so they get in and can not get out. I thought I may try to use an old plastic milk bottle to do that with little expense.