Identifying venomous snakes: How hard can it be?

Discussions and information on all Southern African Reptiles
User avatar
Lisbeth
Global Moderator
Posts: 42924
Joined: Sat May 19, 2012 12:31 pm
Country: Switzerland
Location: Lugano, Switzerland

Identifying venomous snakes: How hard can it be?

Post by Lisbeth » Fri May 18, 2018 3:16 pm

Posted on 11 May, 2018 by Tyrone Ping in Animal Encounters, Research, Wildlife

Image
The large, emerald green eyes of a juvenile boomslang © Tyrone Ping

Actually, it’s a lot more complicated than you’d think. There aren’t any hard and fast rules to distinguish a venomous snake from a non-venomous snake in southern Africa, and many people get bitten by snakes that they misidentify as ‘harmless’. I like to call this “learning the hard way” once they realise they’ve just picked up a venomous snake.

In our digital age of the internet and social media, we have access to a wealth of information about snakes. However, a large portion of this information is inaccurate, and it’s not governed by any standards. This means that anyone with access to a computer can write about any given topic and publish articles online. So, when it comes to telling the difference between venomous and non-venomous snakes you can’t always trust Google.

Snake eyes

A common piece of misinformation that has gone ‘viral’ online is that you can tell harmless snakes from harmful ones just by looking at the eyes. If the snake’s pupil is round it is said to be harmless, while if the eye is elliptical (like cat eyes) the snake is said to be venomous, which is totally false within southern Africa.

All the shape of the pupil tells you about the snake is whether it is nocturnal (active at night) or diurnal (active during the day).

Let’s debunk this myth by having a look at some of southern Africa’s venomous and non-venomous snakes, and the pupil shapes they have.

Image
The highly venomous puff adder © Tyrone Ping

Image
The harmless rhombic egg eater © Tyrone Ping

In short, if you have to get close enough to see the inner workings of a snake’s eye you are already too close, and well within the strike zone of the snake. So, it’s best to avoid this all together!

Image
The highly venomous green mamba © Tyrone Ping

Image
The harmless spotted bush snake © Tyrone Ping

Snake head shapes

Another common misconception that sits in fiction is that all venomous snakes have triangular heads (much like an adder). Many non-venomous and mildly-venomous snakes may imitate adders by flattening their heads and striking out viciously.

The harmless rhombic egg eater and the herald snake are well known for this behaviour.

Image
A herald snake flattening its head in a defensive pose © Tyrone Ping

There are numerous venomous snakes capable of inflicting dangerous, painful bites, such as the infamous stiletto snake. This snake’s head is barely discernible from its body, which makes it easily confused with many harmless snakes such as blind snakes or thread snakes.

Image
The dangerous Bibron’s stiletto snake © Tyrone Ping

Image
The harmless Bibron’s blind snake © Tyrone Ping

Snake colours

When it comes to snakes and their colours, there are typically two variations you’ll encounter: snakes with bright colours and those with dull or cryptic colours. It’s commonly known that animals with bright colours are coloured so as a warning sign to keep away.

There are many brightly coloured snakes found in southern Africa, although many of these simply imitate the dangerous species while being practically harmless.

The old rhyme “Red touch black, safe for Jack. Red touches yellow, kills a fellow” is not applicable to southern African snakes.

Image
The dangerous coral shield cobra © Tyrone Ping

Image
The mildly venomous spotted harlequin snake © Tyrone Ping

Dull or cryptic colours are used by animals as camouflage to blend into their natural habitat and surroundings.

Many snakes rely on their camouflage to hide them while they ambush prey, or to simply help to prevent them from becoming prey to something else. Both highly-venomous and harmless snakes make use of cryptic colours, so don’t let this fool you.

Image
The dangerous East African gaboon adder © Tyrone Ping

Image
The harmless rhombic egg eater © Tyrone Ping

What should you do when you encounter a snake?

• Do not panic. Contrary to popular belief, snakes won’t simply attack you.

• Do not pick up the snake, especially by the neck or behind the head; this is extremely dangerous and if done incorrectly you could get you bitten.

• Do not attempt to kill the snake. Remember, if you’re close enough to strike the snake with something, you’re close enough to get bitten. Some snakes can spit/spray their venom up to 3 metres.

• Do maintain a safe distance away of at least 3 metres. At this range it is very difficult for a snake to bite you.

• Do keep an eye on the snake at all times and call a local snake catcher (Google is your friend here) to safely relocate it.

• Do take a photo of the snake if possible, and only if it can be done safely. This will help the snake catcher identify the snake should it disappear before they arrive.

The snakes of southern Africa are a complex group of animals, and no single rule applies to all of them. If you’re still concerned about coming across a snake at some point, invest in a good field guide and get to know the venomous snakes in your area; education is the key.


https://africageographic.com/blog/ident ... 3cf4ca8e69
"Education is the most powerful weapon which you can use to change the world." Nelson Mandela
The desire for equality must never exceed the demands of knowledge

User avatar
Flutterby
Site Admin
Posts: 38762
Joined: Sat May 19, 2012 12:28 pm
Country: South Africa
Location: Gauteng, South Africa

Re: Identifying venomous snakes: How hard can it be?

Post by Flutterby » Fri May 18, 2018 4:37 pm

Interesting. \O

I hope I never get close enough to a snake to ID all these features!! lol

User avatar
Lisbeth
Global Moderator
Posts: 42924
Joined: Sat May 19, 2012 12:31 pm
Country: Switzerland
Location: Lugano, Switzerland

Re: Identifying venomous snakes: How hard can it be?

Post by Lisbeth » Fri May 18, 2018 4:48 pm

Maybe better :twisted:
"Education is the most powerful weapon which you can use to change the world." Nelson Mandela
The desire for equality must never exceed the demands of knowledge

User avatar
Mel
Global Moderator
Posts: 27698
Joined: Sat May 19, 2012 12:31 pm
Country: Germany
Location: Wolfsburg, Germany

Re: Identifying venomous snakes: How hard can it be?

Post by Mel » Mon May 21, 2018 11:57 am

Easily stepped upon... most of them camouflages themselves well. O-/
God put me on earth to accomplish a certain amount of things. Right now I'm so far behind that I'll never die.

Return to “Reptiles”