I noticed it starting in late summer. Red-tailed hawk numbers had been down and few run-ins with coopers were experienced. The few pairs of kestrels that frequent a particular area nearby seemed unaffected though. Haven't seen a red-shouldered hawk at all. No signs of the short-eared owls.
Now, the harriers are extremely few and far in between. About a half dozen is all that I've come across so far. There has been quite a discussion among birders in my area about all this. Lots of theories including a dramatic collapse in the rodent population.
I think Cara Rose noticed this during her eagle trip. Wondering if anyone else in the midwest is seeing this trend right now.
The most recent harrier shot below. Not much to write about unfortunately.