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The simple answer is evolution ! Over millions of years, different snakes developed alternative methods of subduing their prey. While some evolved strong muscular bodies for constricting their potential food, others modified their saliva into venom with varying toxicity.
Second answer, amplifying on the first
It's chiefly because different species of snakes are adapted (by evolution) to different methods of hunting and different prey. Snakes that take immobile or helpless prey such as eggs and nestlings don't need and haven't evolved venom, though they might have (for example) adaptations for climbing trees. And pythons, for example, capture pry by encoiling and kill it by preventing its breathing (constriction), so they don't need and haven't evolved venom either.
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Do non poisonous black snakes eat poisonous snakes?
Some do but they are mistaked as poisonous snakes and are killed like in florida....................... and non poisonous snakes eat the poisonous ones should be worshipped the have saved alot of lifes!!!!!!!!!!!!
Can baby snakes be venomous or do parents protect them?
No because some snakes are not poisnous at all
Are dark purple snakes poisonous?
they are mostly poisonous but some need not be.
What are the release dates for Some Non-Poisonous Snakes - 1914?
Some Non-Poisonous Snakes - 1914 was released on: USA: December 1914
Which is a non poisonous snake?
All snakes are non-poisonous but some are venomous.
Are water snake poisonous?
Most water snakes in the northern and southern united states and upper mississippi river are nonvenomous and not harmful at all. The water snakes in the east coast are poisonous.
Are king snakes poisonous?
No the scarlet king snake looks like a coral snake(poisonous) but the King snake is not Poisonous. There are other types of king snakes but none are poisonous.
Snakeswhy are they so dangerous?
Because some snakes are poisonous.
Are elephant trunk snakes poisonous?
yes, as they are aquatic and aquatic snakes are poisonous.
Is there poisons spiders in Texas?
Some Texas snakes are poisonous. There are rattlesnakes, coral snakes, copperheads and Cotton Mouth Water Moccasins in Texas, all of which are poisonous. Of course, there are many non-poisonous snakes too.
Are all snakes poisonous and do all snakes bite?
No, all snakes are not poisonous. Yes, all snakes will bite (even the ones that are not poisonous) They will bite to catch and eat for or to defend themselves.
How many snakes crush there pray?
All pythons and non poisonous snakes but also some vipers
