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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
 

Are there several enlarged shields on the top of the head (generally 9, sometimes 11)?

 yes  

Sistrurus catenatus,

Crotalus ravus
 no      no        
                     
         Crotalus sp. (excluding Crotalus ravus)
   
           

Are there several enlarged shields on the top of the head (generally 9)?

 

yes 
      
  Agkistrodon sp.

    
no
           
             

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

 yes      
  Lachesis sp.

 
no
           
             

Are there characteristic markings in the form of open triangles or arrowheads?

 yes
  Bothrops asper

no
           
             

Atropoides sp.

Bothriechis sp.

Cerrophidion sp.

Mixcoaltlus sp.

Ophryacus sp.

Porthidium sp.