Habitat seems to play a large role --- I've always raked leaves and piled up sticks which fall from trees in our yard into a compost pile in a shady area, which

Habitat seems to play a large role --- I've always raked leaves and piled up sticks which fall from trees in our yard into a compost pile in a shady area, which I've been careful to disturb as little as possible from from fall through spring, since fireflies lay eggs in such piles, and their larvae mature in such conditions. My kids would invite their friends over on nice summer evenings to see fireflies, since none of the McMansion neighborhoods had nearly as many.