They are certain it is non-poisonous, or they are stupid.
Head and tail.
You cannot determine if a snake is poisonous based on its tail scales. The presence of venom glands and fangs are better indicators of a snake's venomous nature. It's safest to assume all snakes are potentially dangerous and to give them space.
Its ability to hold its breath and its paddle shaped tail.
Yes.
The snake is an animal that has no tail.
no it has an actual snake for a tail
if you want to hold a little snake hold it by the tial and the head of the snake
No, there is no 'snake tail' in any HP book.
The shape of its tail is pretty flat because it helps the snake swim faster in the water.
somewhere by its tail.
It wouldn't be a rattle snake or snake without a tail. Would it??
Yes there is a snake with two heads without tail, however such snakes are rarest of the rare.