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Poisonous animals
Cnidarians (Jellyfish, Corals and Anemones)
Venomous fish
Hymenopterans (Bees, Wasps and Ants)
Sea snakes
Terrestrial snakes
Miscellaneous animals
North America
Mexico and Central America
South America and the West Indies
North Africa, Near and Middle East
Central and Southern Africa
The Far East
Indian Subcontinent and Southeast Asia
Australia and the Pacific Islands

Find terrestrial venomous snake by morphology (regional)

Select the snake family or subfamily and your current world region. If you don't know the family/subfamily, go to the "Find terrestrial snake by morphology (general)" page and follow the instructions.


Elapids Pit Vipers

Morphological identification key


Is there a "rattle" or a knob-like projection on the end of the tail?

yes   Crotalus durissus ssp.

Are there protruding, spiky scales underneath the tip of the tail?

yes   Lachesis sp.

Are all or at least some of the subcaudal scales (underneath the tail, from behind the anal plate A, which covers the cloaca) divided?

yes   Bothrops spp. or Bothriopsis spp. (in some cases also Porthidium hyoprora)
Bothriechis spp. or Porthidium spp. (P. hyoprora also has divided subcaudal scales in some cases)