Some Australian cockroaches definitely fly but don’t seem to do it very often. They’re quite noisy when they fly—kind of like the propeller sound you make if you trill your tongue—and there’s nothing worse than hearing that sound suddenly stop very close to you. ‘Oh fuck! Have I got a cockroach on me?’ I hate them.
I think it’s pretty good for what it’s trying to do, which is relay scientific data to non-technical readers.