black snake
Hm...wad kind of snake it was? Did u find any further details?
Cottonmouth (white mouth). The answer's in the question.
mud snake
The red-bellied black snake, which is native to eastern Australia, is black with a distinctive pink-red belly.
Garter snake
I believe you are refering to a black rat snake.
Northern Black Racer
Eastern smooth green snake
I believe you are referring to the Grey Rat Snake.
None ! All snake eggs (or baby snakes for live-bearers) are expelled from the female snake's cloaca (vent).
That is the endangered Georgia Tube snake.