IDENTIFICATION OF POISONOUS SNAKES AND NON-POISONOUS SNAKES

DIFFERENCE BETWEEN VENOMOUS AND NON-VENOMOUS SNAKES

Most of the snakes are non-poisonous. Identification of poisonous or non-poisonous snakes is important because sometimes the bite of a non-poisonous snake may lead to death out of fear. The poisonous snakes possess certain characteristics by which it is possible to distinguish them from non-poisonous snakes.

The poisonous snakes are identified by a careful examination of the following points.

1.Nature Of The Tail,

2.Natureof The Ventrals,

3.Nature Of The Scales On The Head,

4.Nature Of The Sub-Caudal Scales,

5.Nature Of Vertebrals.

1.From The Nature Of The Tail

The tail of a snake should be observed first.



If the tail of a snake is flat, laterally compressed and oar-shaped (adaptation to swimming in water), it is a sea snake. All sea snakes are poisonous. The body is covered by small scales dorsally.Eg: Hydrophis, Enhydrina.

If the tail ends bluntly, it is non poisonous.

If the tail is round orcylindrical and pointed, it may be poisonous or non-poisonous. It may be terrestrial or fresh water.

IDENTIFICATION OF  SNAKES  NON-POISONOUS tail

2. From The Nature Of The Ventrals

If the tail is round and not compressed, then examine the ventrals (scales on the ventral side of the trunk).

a.If the ventrals are small and narrow, it is a non-poisonous snake.

b.Insome non-poisonous snakes like Python, the ventrals are fairly broaa, but do not extend compieiely across the belly. On either side of ventrais, small scales are present.

If the ventrals are broad extending completely across the belly, it may be poisonous or a non-poisonous snake.

IDENTIFICATION OF  SNAKES  NON-POISONOUS scales

3.From The Nature Of The Scales Or Shields On The Head

If the tail is round and the ventrals are broad, then examine the head of the snake.

If the head is triangular and covered with small scales and not with shields, it is a viper. All vipers are poisonous. Vipers are of two L types. 1. Pit vipers, 2. Pitless vipers.

If there is a loreal pit between the eye and nostril, the snake is a pit viper (pit organ is athermoreceptor)

Eg: Trimeresurus (lachesis)

Some pit vipers possess shields on their heads. Eg : Ancistrodon

If there is no loreal pit between the eye and the nostril, it is a pitless viper.

If the head is covered with small scales and there is no loreal pit, then the sub-caudals are to be examined.

If sub-caudals are in two rows and there is no loreal pit, then the snake is Russels viper.

It is a pitiess viper with a iarge body and bears 3 rows of large diamond-shaped spots on the dorsal side of the body.

NTIFICATION OF  SNAKES  NON-POISONOUS

If the sub caudals are in a single row and there is no ioreai pit, then the snake is Echis carinata (the little Indian viper). The head bears arrow shaped mark on the head. It is phoorsa

NTIFICATION OF  SNAKES  NON-POISONOUS viper

4, From the Nature of the Vertebrate

If the head is covered with shields, not with small scales it may be poisonous or non poisonous. Then examine the vertebrals (scales present along the mid-dorsal line on the back).

If the vertebrals are large and hexagonal, it is a krait and it is highly poisonous. In addition to the enlarged vertebrals, the krait is characterised by the presence of only 4 infra-labials of which the fourth one is the largest (infra-labials are the shields forming the margin of the lower jaw). The sub-caudals are present in a single row in krait. Eg ; Bungarus.

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If the vertebrals are not large, then examine the supra-labial shields (the shields forming the margin of the upper jaw). If the third supra-labial shield touches the nasal shield and the eye, it is either a cobra or a coral snake. Both cobras and coral snakes are poisonous.

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Cobras {Naja naja, Naja hanna) are identified by a hood and the coral snakes (Callophis, Hemibungarus) are identified by the presence of brilliantly coloured peculiar spots on the belly and by the absence of hood.

NTIFICATION OF  SNAKES  NON-POISONOUS hood 

5 From the Nature of Snake Bite

Depending on the nature of bite, it can be judged whether it is a poisonous or non-poisonous snake.NTIFICATION OF  SNAKES  NON-POISONOUS bite

When a poisonous snake bites, there will be 1 or 2 punctures on the skin of the victim (the punctures are made by fangs). If a non-poisonous snake bites, many punctures are usually made on the skin by the maxillary teeth of upper jaw.

6 comments:

  1. it's very usefull information's......

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  2. Seriously people! Snakes are not poisonous they are venomous.

    ReplyDelete
  3. Seriously people! Snakes are not poisonous they are venomous.

    ReplyDelete
  4. All of snake is non poisonous they are venomous. But i think only one snake have a poison, this is Rhabdopis subminiatus. This snake have a gland in the nuchal and produce a poison.

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  5. What is your reference? May i know it?

    ReplyDelete
  6. What is your reference? May i know it?

    ReplyDelete