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Distribution

See Geographical Distribution to narrow down the possible culprits on country/state level.

Biological Features

North Africa, Near and Middle East

Description of the most important representatives: 

  General behaviour Habitats Appearance Defensive behaviour Factors relevant to envenoming

Naja sp.

 

primarily nocturnal

ground-dwelling

except for desert areas, found everywhere, especially in open habitats; can be found close to human settlements; also in plantations

relatively solid body, wide head, but not substantially distinct from the body; length up 1.5–2 m or more

raising the first third of the body; neck region is spread out into a flat hood (Fig. 4.57)

dangerous snake often found close to humans; responsible for a large number of bites; also enters houses and is known to have bitten victims during the night

Atractaspis sp.

 

nocturnal

live underground; surface at night or after heavy rainfall

from tropical forests to desert regions

largest species up to 90 cm, small head

non-aggressive during the day – roll themselves into a ball

"bites" occur in victims walking around at night or while handling these snakes; the venom fangs are projected laterally, with the mouth virtually closed, and the fangs are stabbed into the victim via sidewards movements of the head

Bitis arietans

nocturnal, but often lie sunning themselves during the day

ground-dwelling

common in savannas and grasslands

solid body that appears short; on average barely more than 1 m, although in East Africa up to 1.5 m

loud puffing (thus the name Puff adder); they rarely flee and rely on their markings for camouflage

responsible for large numbers of bites; many bites occur when the snakes are accidentally trodden on

Cerastes sp.


primarily nocturnal

ground-dwelling

sandy deserts and stony regions with sparse vegetation

sturdy body; length on average 35–50 cm; "side-winders"

they rub the coils of their body together to produce a clearly audible warning sound, as in Echis spp.

not known

Echis sp. 


primarily nocturnal, in cooler weather also active during the day 

ground-dwelling

dry regions, such as sand deserts, semi-arid rocky deserts, steppes and savannas, but also in agricultural areas and gardens

small snakes with an average length of 35 cm (max. 80 cm); slender to sturdy body; "side-winders" 

by continuously rubbing the coils of their body together they produce a clear warning sound similar to that made when two pieces of sandpaper are rubbed together; from this position, they dart forwards rapidly and may strike repeatedly

extremely nervous and agitated; rarely flee; although small, they are among the most dangerous snakes of all; in some areas extremely common and responsible for the most snakebites by far

Vipera sp.
Macrovipera sp.


nocturnal in warm weather, diurnal in cool

ground-dwelling

prefer dry and stony habitats; steppes, mountainous areas; but also in forests, agricultural areas and gardens; V. palaestinae prefers damp habitats and is often found close to human settlements

sturdy body with a length of up to 1–1.6 m in the larger species

body is coiled into a taut S-shape; repeated hissing

primarily the larger species are dangerous; V. palaestinae responsible for the most snakebites in Israel by far

Snake available

Morphological Identification

Morphological key to the terrestrial venomous snakes

(excluding sea snakes)

Only ever pick up dead snakes! Caution - reflex bites are possible in snakes that have only just been killed. Hold the snake with one hand behind the head, and with the other hand open the mouth using tweezers and observe the dentition (also look for teeth that may be hidden in mucosal folds). 
 
  Are all the teeth +/- of the same size?  yes  

Harmless snakes

(local symptoms may occur)

  no 
     
       
  Enlarged teeth (venom fangs, generally grooved at the front or with a venom duct orifice near the tip) are +/- at the back; there are always normal teeth in front of these venom fangs! yes  

some species of Colubridae

 
   no 
     
       
  Venom fangs are at the very front of the row of teeth and are +/- fixed (not moveable) in the upper jaw. May be so small as to be barely visible! yes
   

Elapidae (no Elapidae in Europe!)

» proceed to regional identification
   no 
     
       
  Exceedingly long venom fangs at the very front of the upper jaw that can be erected forwards, in rare cases laterally. Normally they are folded back and covered by mucosal sheaths!    
           
     
  Is there a pit between the nostril and the eye? yes
   

Crotalinae (no Crotalinae in Central and Southern Africa, and Australia!)

» proceed to regional identification
    no      
       
  Viperinae (no Viperinae in the Americas and Australia!)

» proceed to regional identification