At the present time all the images you can find on Frogs-Watch.co.uk are of the Common
Frog as this is the species that is present in the Frogs-Watch.co.uk ponds. A large
part of e-mails we receive are about identifying Frogs so we have written this brief
guild to help.
Some helpful features which can be helpful in identified frogs are the paratoid gland,
the dark area behind the eye, the vocal sac which can be below or at the side of
the mouth, the ear drum, dorsal folds, Webbing and pads on the feet and hands and
the length of the legs.
Common Frog or Grass Frog
The Common Frog can vary in colour greatly from light yellow, green, olive, brown,
and towards red often with markings in patches, marbled and spots, the underside
is white to pale yellow. Size is up to 10cm. relatively short legs. The dorsal folds
which run the length of the back are closely spaced. The ear drum can be seen clearly
with a dark mask behind the eye. The males have internal vocal sac’s and are only
usually heard in the mating season February to April. Spawn is a large mass of 3000
to 4000 eggs . Lives mostly on the land and returns to the water for breeding.
Marsh Frog Edible Frog and Pool Frog
The male of the Green Frogs have a white or gray vocal sac’s at the corners of the
mouth and are more vocal than the Brown Frog. The Green Frogs don’t have a visible
mask behind the eyes, and are more aquatic. Size is up to 15cm, colouring variable
from green to brown often with a pale yellow or green stripe along the centre of
Common Toad and Natterjack Toad
Toads tend to be drier looking with warts and stouter in form with variable colouring.
Size is up to 15cm Common Toad and the Natterjack Toad up to 10cm. In the water the
female will lay thousands of eggs in long strings. The toads tend to be nocturnal
with the Natterjack Toad found in sandy areas.
In March and April Frogs spawn is laid in clumps of jelly like eggs and can usually
be seen on the surface. Also in March and April Toads lay their spawn in long chains
a couple of meters long amongst the water plants.