The natterjack toad (Bufo calamita) is a toad native to sandy and heathland areas of Europe. Adults are 60–70 mm in length and are distinguished from common toads by a yellow line down the middle of the back, and parallel paratoid glands. They have relatively short legs, and this gives them a distinctive gait, contrasting with the hopping movement of many other toad species.

Natterjacks have a very loud and distinctive mating call amplified by the single vocal sac found under the chin of the male, so their name literally means the chattering toad - the jack (or toad) that natters (or chatters).

Life history

File:Natterjack Toads calling.ogvPlay media
Natterjack Toads calling

Egg strings

PuddleWithTadpoles

A very young natterjack

A slightly older natterjack, though still not fully grown
Natterjacks live for up to 15 years and feed mainly on insects, especially beetles. At night they move around open terrain with sparse vegetation, and in loose sand their tracks can often be seen. They move considerable distances each night, enabling the species to colonize new habitats very quickly.

The natterjack toad spawns between the end of April and July, laying strings of eggs in shallow, warm pools. Because the natterjack toad is often present in low numbers, its loud mating calls are important so that the sexes can find each other.

For natterjacks, pools need to have a very slight slope with sparse vegetation on the banks and in the water. As such pools are often temporary, sometimes the tadpoles die when the pools dry out. The natterjack compensates for that risk by mating over an extended period each summer. Thus in September the age of the juveniles can vary from a month to three months. Early breeders are not often the same individuals as the toads that reproduce later in the season, though some females do spawn twice in a year.

Distribution

Populations of the natterjack extend through 17 European countries. In the British Isles the toad is now almost completely confined to coastal sites. The natterjack is the only species of toad native to Ireland. It is found on the Dingle peninsula and at Derrynane in County Kerry, and also in County Wexford where it was introduced to a dune site.

In mainland Europe, particularly in the southern part of its range, it lives inland in a variety of habitats.

Conservation

In the UK the threatened status of the species resulted in the national Biodiversity Action Plan designating it as one of three protected amphibians. Reasons for its threatened status include:

loss of habitat from human overpopulation
deterioration and loss of lowland heaths
reduction in habitable coast from construction of dykes and seawalls
acidification of aquatic habitat from acid rain and other pollution
In England, the toad's sand dune habitat is protected by a number of National Nature Reserves. For example, in the north-west there are reserves at Hoylake, Ainsdale Sand Dunes, North Walney and Sandscale Haws. In Scotland, where the species is confined to the Solway Firth, there is a reserve at Caerlaverock. In Wales the species became extinct in the twentieth century, but has been reintroduced as part of the Biodiversity Action Plan.

To reverse habitat loss the National Parks and Wildlife Service has created ponds for the species with some funding from the Heritage Council.

In fiction

The natterjack is a primary character in the book The Time Garden by Edward Eager. In it, the natterjack is portrayed as a magical creature who understands the laws of magic and time and assists the children on their adventures
Natterjack is a character in the CBeebies show Kerwhizz

source - Wikipedia