Climate change is killing fireflies – threatening a US summer ritual | Scientists say lightning bugs are having a revival this year – but they’re concerned about the insects’ long-term viability

I saw a pair of fireflies this summer, the first I've seen in years. I thought they'd completely disappeared, to be honest.

We used to have many fireflies around midsummer in our garden (in belgium) - until we got ducks, now they are fewer. Their larvae eat slugs and snails, so those ducks compete for the same food. I'd guess "pest control" is a bigger cause for decline than climate, in this case.