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.
Find terrestrial venomous snake by morphology (regional)
Selection
|
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) | |||