Each to it's season

Insects occur in seasonal abundance, often to coincide with plants on which they feed or lay their eggs. The Common Red Soldier Beetle, rhagonycha fulva can be seen from June into August at the same time as Common Hogweed, Heraclium sphodylium.

Another name for the Common Red Soldier Beetle is Hogweed Bonking Beetle. They find the open umbelliferous florets very much to their taste and gather there in large numbers. 

Of course when your breeding season is so short, and someone has just cut the flower meadow again, you can't afford to be too picky.