I live 5 hours north of Syracuse in Canada, but grew up in Indiana. Never had fireflies up here like my youth until 3 years ago.

We still get fireflies in NE Kansas.

And we get plenty in New York City still.

Sea stars out here in Seattle— the pilings at the piers used to be covered in purple and orange sea stars, and then they disappeared entirely for years. Sea star wasting disease (rising acidity and temps in the oceans?).

I suspect this is more habitat loss at this point. I put in a native pollinator garden & the fireflies love it. They light up my porch every night.

I’m sure in part. I also wonder about the use of insecticides and lawn chemicals. Our front yard is basically a field of lily of the valley, which the fireflies love. We don’t use chemicals, but many of our neighbors do. All I know is that I delight when I see them and miss them when they are gone.

Also I stopped mowing the backyard when my kids stopped playing back there so much. So lots of fireflies back there.