Poisonous & venomous, classically, are quite different. This comes from the
Smithsonian:
Traditionally, venomous creatures bite, sting or stab you to do their
damage, while you have bite or touch poisonous critters to feel their
effects. That means venomous organisms need a way in, like fangs or teeth.
All octopuses are venomous, along with some squid, plenty of snakes,
spiders, and scorpions, a few lizards, vampire bats and even the slow loris
Nycticebus kayan. Some fish, including lionfish, use spines to sting
attackers with venom. The Brazilian frogs aren�t even the only venomous
amphibians. When attacked, Iberian ribbed newts push out their own ribs so
that spikes on the ends jab a predator with toxin.

Poisonous organisms take a more passive approach, often lining the skin or
other surfaces with toxic chemicals. Poisons can either be brewed from
scratch inside the animal or acquired through diet. Cane toads naturally
secrete poison they make in glands behind their ears. Meanwhile, poison
dart frogs generate a highly poisonous alkaloid skin coating they derive
from munching on ants. Mama frogs pass the chemical on to tadpoles via egg
sacs, so if you take a young poison dart frog out of its natural habitat,
it will actually lose toxicity.

So, with the above venomous vs poisonous definitions in mind, I would say:

Venomous snakes may kill you with their deadly bite.

Cheers,
AB
�