All life on Earth developed under a constant EMR bombardment. But I will remain open-minded that certain frequencies of EMR may be damaging to insects.

In 30 years living off and on in forestland near the town of Lorane, I have noticed big cycles in insect populations.  This year there have been a lot of biting flies and mosquitos, and two nights ago at dusk there was a remarkable hatch of flying termites accompanied by the biggest swarm of dragonflies I have ever seen here, darting around in pursuit of a bug meal.  Lots of swallows, nighthawks and bats. I see a good number of bumble, honey, and mason bees.  However, I haven't seen a giant ichneumonid wasp (locally known, for its impressive ovipositor, by a vulgar name) in years.  I attribute that to habitat destruction from intensive logging.

The spiders and flies in my house seem oblivious to WiFi EMR.

Maybe insects and the birds that eat them are locally scarce.  I would blame pesticides, but I'm skeptical about the EMR Scare.