OP mentioned black cats.
I can't say I"ve seen a black one. Though one at night was VERY dark.
That said who hasn't seen a deer almost black in color depending on how they hold their hair and the lighting, sun angle etc...
Cats though, over all, are around, I"d doubt there would be any single county in TX that doesn't have one, excepting possibly counties that are almost totally large urban jungles.
