Common toad France
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Common Toad & Southern
Common Toad
Until recently it was thought that the Common Toad Bufo bufo was the species
that occupied most of France and that the sub-species Southern Common Toad, Bufo
bufo spinosus, was only to be found in the South of France. With little
if any obvious external difference that assumption remained the case until
genetic studies were conducted that turned everything on its head. It turned
out that it is Bufo bufo spinosus that occupies most of
With
this in mind it it is only necessary to describe their biology and behaviour
together. These toads can reach 19cm in length in the case of females with
males being considerably smaller. Back and upper surface can be brown, grey
or greenish with dark spots and the tone can be altered according to
surroundings. The underside is cream or grey. They have a large head with a
rounded nose and their eyes are copper or gold with horizontal slit pupils.
The skin is warty and can excrete toxins when threatened which deter
predators. Back feet are partially webbed. |
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They can
be found living in all types of habitat in |
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Reproduction starts in March in a pond or lake and it is likely that they
return to their birth place where they gather in large numbers. There seems
to be some preference for water where fish are present, this presents no
real problems for the tadpoles due to their toxic skin. Males fight
furiously for a female and a single female can have as many as ten males on
top of her in a heap which sometimes ends with the female being crushed or
drowned, part of the difficulty is caused by the spawning process whereby
she swims around laying the spawn in long strands which are fertilised by a
male that has attached himself with a firm grip. Anything from 200 to 7000
eggs can be produced by a single female, 1500 being typical. ABOVE: It isn't unusual for females to be drowned during the mating season. This one had probably been held under by the weight of several males the previous night. |
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