Lux

It seems like all the biggest roosts or at least the documented ones are in the Northeast US.  Searching on ebird, the most i found documented in Georgia, US was 2000 a few years ago.  This year the high count is 110.  And I'm not sure if those were foraging or roosting.  Do crows roost in large numbers less in the southeast? Because its warmer? Or is it just documented less?  Curious if anyone knows why and/or knows of big roosts you can find in the south. Thanks!