4567
No.
at a pet store usually
I know a couple: * rat snake * king snake * black snake * grass snake
They are not venomous, but will bite to defend themselves.
There are 123 venomous snakes in Texas and 3456 non-venomous snakes in Texas.
black, scaly, and long
7
That depends. The term black snake can apply to many different species of snake. The black rat snake, Pantherophis obsoletus, sometimes called the black snake, is indeed a rat snake.
The longest black snake in North America is named the black rat snake. The record size recorded of this black rat snake is eight feet in length. Which makes the black rat snake is the record longest.
4567
No.
The gray rat snake can have such markings, and even the common black rat snake can show gray bands when distended.
at a pet store usually
In most of the Rat Snake species, the life-span is around ten to fifteen years.
birds
There would be no impact on other snakes - due to the Black Rat snake being a rodent eater. Other snake species would co-exist so long as there was enough natural prey to support all snake species in the area.
Black rat snakes and black racer snakes are two different types of snake. Both are...well...black. They are almost identical in appearance, however black racers tend to be more slender. If you encounter a black snake that quickly slithers away or becomes aggressive, it is probably a black racer. If you encounter a black snake that freezes in place or slithers away slowly, it is probably a black rat snake.