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Poisonous animals
 
Cnidarians (Jellyfish, Corals and Anemones)
 
Venomous fish
 
Scorpions
 
Spiders
 
Hymenopterans (Bees, Wasps and Ants)
 
Sea snakes
 
Terrestrial snakes
 
Miscellaneous animals
 
North America
 
Mexico and Central America
 
South America and the West Indies
 
Europe
 
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.

Selection

 
Elapids Pit Vipers

Morphological identification key

 Crotalinae    
     
  

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

yes   Crotalus durissus ssp.
   
   
no    
     

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

  
yes   Lachesis sp.
   
   
no    
     
  

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)
   
   
 no    
     
Bothriechis spp. or Porthidium spp. (P. hyoprora also has divided subcaudal scales in some cases)