I cannot get a paring

Hi Everyone,

I cannot get any butterflies to pair. I have set up cabbage and broccoli for cabbage whites but they won’t pair. One male was courting her the other day and the female’s abdomen looks bloated, but don’t they have to pair for at least a day? Does the bloated abdomen mean anything? I also have many Colias species that won’t breed either. Does anyone have any experience?

Thanks,

Ethan