Frog or Toad?

Frog or Toad?

WildNet - Tom Marshall

A quick guide to recognising and differentiating common UK herps (reptile and amphibian) species.

"Eye of newt, and toe of frog,
Wool of bat, and tongue of dog,
Adder's fork, and blind-worm's sting,
Lizard's leg, and howlet's wing,--
For a charm of powerful trouble,
Like a hell-broth boil and bubble."

This is a wonderful quote from one of the witches in Shakespeare’s Macbeth, but how does any budding occultist know if their toe is from a frog and not a toad? or that they have extracted an eye from a newt and not a lizard? Who knows the chaos a mix up might cause!

Amphibian or reptile?

Firstly, let’s talk about herps (the collective name for reptiles and amphibians). All reptiles and amphibians have things in common: they have a skeleton on the inside with a basic pattern similar to humans, and they all use the external temperature to regulate their internal temperature (this is called ectothermy). Locally, nationally and globally, amphibians and reptiles are under threat from unpredictable weather due to climate change, plus habitat loss and fragmentation, amongst (many) other things. This is why our nature reserves and the work we do to connect them is so important.

Amphibians

UK examples:  frogs, toads and newts
Common UK species: common frog, common toad, smooth newt
Skin is usually moist with no scales
Lay jelly-covered eggs in water
Often move slowly
Born with gills and develop lungs. Can also breathe through their skin

Reptiles

UK examples: snakes and lizards (sea turtles are sometimes found in UK waters)
Common UK species: common lizard, grass snake, slow worm (a legless lizard)
Skin is dry and covered in scales
Lay eggs with a leathery shell, or give birth to live young on land
Can move quite quickly
Born with lungs, cannot breathe through their skin

Have I got frogs or toads in my garden pond?

Many people in the UK think that if it’s big it’s a toad, but this is not true. Our common frog and common toad are roughly the same size (up to around 10cm). The females of both species are bigger than the males, so if it’s big, it probably a girl.

It is more likely that you have frogs rather than toads breeding in your garden pond because frogs prefer smaller ponds, but you might have either or both hunting for beetles! All UK amphibians spend more time on land than they do in water, so terrestrial habitat for hunting is as important as water for breeding.

You can read about making your garden better for wildlife, especially by adding water, in my series of blogs on wildlife gardening for beginners. There are also many ideas in the Help Wildlife at Home section on our website.

Common frog

Ross Hoddinott/2020VISION

Common frog

Smoother wetter skin
Some warts
A black eye strip (this can fade in breeding season)
Moves mostly by jumping
Has a circular mark behind the eye which is their ear drum
Prefers to lay eggs in smaller ponds that are fish free, so they are more likely to be seen in garden ponds. Can sometimes lay eggs in shallow puddles or ditches.
Has folds of skin that make a line down either side of the body giving it a more angular shape
Has longer legs
Lays eggs in clumps
Males purr to attract a mate

Find out more

Common toad by Dawn Monrose

Common Toad, Bufo bufo, on brick edging in garden, Norfolk - Dawn Monrose

Common toad

Drier bumpier skin
Loads of warts
No black eye stripe
Moves mostly by crawling
Has a rugby ball-shaped lump behind the eye which is a gland for releasing a nasty-tasting toxin
Prefers to lay eggs in larger ponds and lakes as they don’t taste nice to fish so less likely to be seen in garden ponds
No folds of skin so has a more rounded shape
Has shorter legs
Lays eggs in strings wrapped around plants
Males chirp to attract a mate

Find out more

Have I got great crested newts in my pond?

It is quite tricky to tell our newts apart, and even some experts find it difficult as you don’t always get the perfect view, and there is overlap in size, colour and distribution. Sometimes it’s ok to just enjoy wildlife, you don’t always need to know what you have seen! If you really want to know, getting a photo might help and you could try posting it on our Monitoring and Research Facebook page, but please take care not to disturb animals in order to do this. In general, it is not a good idea to handle amphibians as their skins is very sensitive, and great crested newts are protected by law. (this does not apply if removing an animal from immediate danger like a road).

Newts and lizards have a similar body shape, but lizards tend to move faster on land and have scaly skin. Newts have four toes on the back leg and lizards have five.

The most likely newt you have in your garden pond is a smooth newt.

A great crested newt swimming with one arm raised, apparently in greeting

Great crested newt

Fairy common in our region
Larger (around 15cm)
Bright orange belly with irregular black blotches
Appears black out of water with white spots and warty skin
Male has jagged crest and a white stripe on the tail in breeding season

Find out more

Smooth newt illustration

Smooth newt - Niall Benvie/2020VISION

Smooth newt

Very common in our region
Medium (around 10cm)
Bright orange belly with circular black splodges
Appears brown out of water with smooth skin
Male has wavy crest in breeding season

Find out more

Male palmate newt swimming underwater

Male palmate newt swimming underwater (field studio) - Niall Benvie/2020VISION

Palmate newt

Not very common in our region
Smaller (around 9cm)
Paler pink or orange belly with dark dots
Appears brown out of water with smooth skin
Male has webbed back feet and a filament on the end of his tail in breeding season

Find out more

Do I have an adder in my garden?

No! It is extremely unlikely that you have an adder in your garden. Many people are frightened of snakes, but the UK’s only venomous snake is not often seen and hardly ever causes a problem for people or dogs (regardless of the scare stories you might read in the paper). It is a rare animal, especially in our region, and very shy. It hangs out in drier, open habitat like heath, chalk downland, or open woodland. The most likely snake you will see anywhere in the UK is the grass snake. Grass snakes like to eat frogs so hang out by water and can often be seen swimming. They are wimps and often play dead if threatened.

Adder

©Jon Hawkins

Adder

Very obvious zig-zag pattern down the back.
Males are usually greyish with a black zig-zag, females are brown with a brown zig-zag.
Brick-red eyes with vertical pupils like a cat’s eye
Medium, around 80cm
Eats small mammals and chicks of ground-nesting birds

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Grass snake coiled on leaf litter

Grass snake by David Chamberlain

Grass snake

Obvious yellow collar around the neck, and often has black bars down the side
Yellowish eyes with large round pupils
Larger, around 1m (females can get bigger)
Likes to eat frogs

Grass snake

Slow worm

WildNet - Bruce Shortland

Slow worm (not a snake, but a legless lizard)

Golden brown colour. Females have darker brown sides. Male sometimes have small blue flecks
Small eyes with round pupils
Smaller, around 50cm
Likes to eat slugs

Find out more

Reptiles and amphibians are amongst my favourite animals. There is nothing like the thrill of spotting a grass snake swimming across a lake, or watching the amazing spectacle of a frog breeding pond.

You can read about why you should also love frogs and toads as much as I do, and how you can help them in my blog about toad patrol. The photos below were taken while on toad patrol.