Common toad

Common toad
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Name	Common toad
Status	Least Concern
Status system	IUCN3.1
Genus	Bufo
Species	bufo
Authority	Linnaeus, 1758

Common toad

The common toad is a widespread amphibian species first described in 1758 by Carl Linnaeus and later treated in taxonomic works by Johann Friedrich Gmelin and other naturalists. It appears in field guides used across United Kingdom, France, Germany, Spain, Portugal, Italy, and much of Europe and western Asia, and features in conservation assessments by organizations such as the IUCN and national agencies. The species has been the subject of ecological studies in contexts ranging from urban ecology in London to long-term monitoring projects in Sweden and disease research at institutions like the Pasteur Institute.

Taxonomy and Nomenclature

Originally named by Linnaeus in the 10th edition of Systema Naturae, the species was placed in the genus Bufo and later addressed in revisions by taxonomists including George Albert Boulenger and Edward Drinker Cope in global amphibian catalogues. Molecular phylogenetic work by researchers affiliated with universities such as University of Oxford, University of Cambridge, University of Zurich, and the Smithsonian Institution has influenced generic reassignments and clarified relationships among Eurasian bufonids. Synonymies and regional names have appeared in faunal monographs produced by agencies like the British Trust for Ornithology and the Natural History Museum, London. International standards such as the International Code of Zoological Nomenclature govern the species’ name usage.

Description and Identification

Adults typically exhibit a robust, stocky body with dry, warty skin described in field guides published by the Field Studies Council and illustrated in atlases from the Natural History Museum. Key identification features are a flattened head, horizontal pupils, and parotoid glands behind the eyes, traits also discussed in comparative keys by Aldo Leopold-style conservation literature and regional keys used by the Royal Society for the Protection of Birds. Coloration ranges from olive-brown to reddish-brown; dorsal warts may contain milky toxin secretions studied at laboratories at Cambridge University and University of Oxford. Sexual dimorphism includes larger females, a feature noted in demographic studies by the British Ecological Society and surveys conducted by the European Amphibian Congress.

Distribution and Habitat

The species’ range spans much of temperate Europe into parts of western Asia, with disjunct populations recorded in the literature of the Zoological Society of London and distribution atlases produced by the IUCN and national conservation bodies such as Naturalis Biodiversity Center in the Netherlands. Habitats include broadleaf woodlands, agricultural mosaics, urban gardens, and hedgerow networks documented by the Royal Horticultural Society and landscape ecology studies at the University of Edinburgh. Altitudinal limits and microhabitat selection are detailed in regional faunas from Norway, Spain, and Turkey and in habitat models developed by researchers at the Max Planck Institute.

Behavior and Ecology

Nocturnal and largely terrestrial outside the breeding season, the species’ movements and migration patterns have been tracked using mark–recapture programs run by organizations such as the British Herpetological Society and telemetry studies at the University of Helsinki. Diet studies in journals associated with the Zoological Society of London show a generalist insectivorous diet including beetles, earthworms, and slugs, with predators recorded in field notes by the Royal Society and museum collections at the Natural History Museum, London. Anti-predator defenses, including toxin secretion and inflation behaviors, were investigated in experimental work at the Max Planck Institute for Chemical Ecology and referenced in conservation outreach by Amphibian and Reptile Conservation Trust.

Reproduction and Life Cycle

Breeding typically occurs in still or slow-flowing waters such as ponds, ditches, and garden pools; breeding migrations to these sites have been documented by local groups like London Wildlife Trust and national amphibian societies including the Amphibian and Reptile Conservation Trust. Females lay long strings of eggs in water, a reproductive mode described in classic amphibian texts by G. C. C. G. S. and compiled in reproductive surveys by the IUCN/SSC Amphibian Specialist Group. Larval development and metamorphosis timing are influenced by temperature and hydroperiod, factors examined in climate-impact studies by the Met Office and evolutionary ecology research at University College London. Longevity, age at maturity, and recruitment rates have been estimated via skeletochronology and long-term monitoring projects coordinated by the European Union’s biodiversity programs.

Conservation and Threats

While globally assessed as Least Concern by the IUCN, local declines have prompted action by entities such as the UK Environment Agency, French Office for Biodiversity, and regional NGOs including the Society for the Protection of Animals Abroad and the European Nature Trust. Threats include habitat loss from agricultural intensification documented in reports by the Food and Agriculture Organization, road mortality quantified in transport ecology studies by the Transport Research Laboratory, and disease pressures such as chytridiomycosis investigated at the Pasteur Institute and Centers for Disease Control and Prevention. Conservation measures implemented by municipal governments and NGOs include habitat restoration projects funded through programs by the European Commission and community-led amphibian tunnels pioneered in partnerships with universities like the University of Exeter.

Category:Bufo