I have a patch of Four O'clocks which are often visited after dark by hawk moths. My cats love to catch them and release them in the house and then run around watching as they bump against the ceiling. Isn't it wonderful discovering new wildlife when you have cats?
But the moth population seems devastated some years. One year I only saw one, and this year have seen none. There was a recent message that encouraged people to leave zebra-striped caterpillars on parsley because they became butterflies, so I looked on Google to find what hawk moths eat so that I could encourage their population. I found this link:
But the good news is that they prefer nightshade if they can find it. Should we grow poisonous nightshade to protect tomatoes? And tomatoes like to self-pollinate, but should we be concerned about cross pollination if we save seed?