[popol12]

Could you please provide details/source ? I'd be very happy to learn that this 50% figure is wrong :)

[revelio]

It's not about insects specifically but this paper points out statistical problems in a very similar claims about vertebrates:

https://www.sfu.ca/biology2/rEEding/pdfs/Leung_et_al_Cluster...

But it's a common theme. These claims get attention and journalists don't check, so they proliferate. Dig in to any given claim and you'll find they're all built on statistical quicksand.