I'm in Chicago (in a neighborhood close to downtown) and in previous years I'd hardly ever seen any fireflies. This year, they're everywhere -- in parks and even in trees on neighborhood streets.

I understand fireflies are sensitive to light pollution. I can't imagine Chicago's any different from other major cities. COVID has people staying home a lot more but that has nothing to do with street lighting. I wonder what's going on.

I do think that living organisms are extraordinarily adaptable if the changes are gradual and bounded. Most of us have this idea that an ecosystem is this delicate and fragile thing, but nature actually has a lot of robustness and redundancies built-in (which are inefficient but increase chances of group survival).