I live in the eastern US away from any major metro center and I see some deer around, sometimes a lot and sometimes not, but it's really not "obvious" that they

I live in the eastern US away from any major metro center and I see some deer around, sometimes a lot and sometimes not, but it's really not "obvious" that they're overpopulated. I wouldn't have any way to draw that conclusion without hearing it from someone in the field who actually knows what constitutes overpopulation for that kind of species. There are also tons of squirrels everywhere but nobody draws the conclusion that they're overpopulated.