Natterjack toad

The natterjack toad (Epidalea 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, which gives them a distinctive gait, contrasting with the hopping movement of many other toad species.

Natterjack toad
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Bufonidae
Genus: Epidalea
Cope, 1864
Species:
E. calamita
Binomial name
Epidalea calamita
(Laurenti, 1768)
Synonyms
  • Bufo calamita Laurenti, 1768

Natterjacks have a very loud and distinctive mating call amplified by the single vocal sac found under the chin of the male.

Life history
Egg strings
Puddle with tadpoles
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 their tracks can often be seen in loose sand. They move considerable distances each night, enabling the species to colonize new habitats very quickly.

Reproduction

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 one to three months. Early breeders seldom breed again later in the season, though some females do spawn twice in a year.

Distribution

Populations of the natterjack extend through 17 European countries.[2] In the UK, the toad is now almost completely confined to coastal sites. The natterjack is the only species of toad native to Ireland. It is found in County Kerry (Dingle Peninsula and Derrynane) and also in County Wexford, where it was introduced to a dune site.[2][3]

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

Conservation

UK

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

In England, the toad's sand dune habitat is protected by a number of national nature reserves. For example, in the north-west, reserves are at Hoylake, Ainsdale Sand Dunes,[4] North Walney and Sandscale Haws. In Scotland, where the species is confined to the Solway Firth, a reserve is at Caerlaverock. In Wales, the species became extinct in the 20th century, but has been reintroduced as part of the Biodiversity Action Plan.[5]

Ireland

To reverse habitat loss, the National Parks and Wildlife Service has created ponds for the species with some funding from the Heritage Council.[2] The natterjack is considered endangered in Ireland. As of July 2021, a project involving Fota Wildlife Park and the National Parks and Wildlife Service has released 6,000 toadlets into their natural range in County Kerry.[6]

The natterjack toad is used as a symbol for Dooks Golf club in Kerry.[7]

References
  1. Beja, P.; et al. (2008). "Epidalea calamita". IUCN Red List of Threatened Species. 2008. Retrieved 19 August 2011.
  2. Viney, M. (4 April 2011). "Here's what biodiversity has done for us". The Irish Times. Archived from the original on 23 October 2012.
  3. Korky, J.K. (2008). "Notes on the 2007 breeding season of the Natterjack Toad Epidalea calamita Laurenti (Anura: Bufonidae) in Ireland". Bull. Ir. Biogeog. Soc. 32: 21–31.
  4. "North Merseyside Biodiversity Action Plan – Natterjack Toad" (PDF). Archived from the original (PDF) on 3 August 2014.
  5. "Natterjack toads return to North Wales". 11 June 2001. Archived from the original on 3 August 2014. Toads from Merseyside have repopulated former strongholds in sand dunes around Talacre, with the help of the Herpetological Conservation Trust.
  6. "Croak park as 500 natterjack toadlets go wild in Kerry". Dublin: RTÉ News and Current Affairs. 30 July 2021. Retrieved 31 July 2021.
  7. "Dooks Golf Club - Kerry Links Golf | Golfing in Kerry | Kerry Golf Courses". Dooks Golf Club. Retrieved 29 September 2023.

Further reading
  • Beebee T and Denton J (1992) An evaluation of survey methods for studying natterjack toads (Bufo calamita) outside the breeding season. Amphibia-Reptilia 13: 365–374.
  • Beebee T and Denton J (1996) Natterjack Toad Conservation Handbook. English Nature, Peterborough.
  • Herpetological Conservation Trust (2009) Natterjack Toad Species Action Plan. Bournemouth.
  • The Herpetological Conservation Trust (undated) Natterjack Toad Survey Guidelines. Bournemouth.
  • Natural England (2011) Standing Advice Species Sheet: Natterjack toads. Sheffield.
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