Vesper bats are the largest bat family with over 300 species, all of which can echolocate. They are widespread and found in every habitat except the cold polar regions. Those that live in temperate areas may migrate away or hibernate through the winter, when few insects are available to eat. All British bats are in this family apart from horseshoes.
Scientific name: Vespertilionidae
The shading illustrates the diversity of this group - the darker the colour the greater the number of species. Data provided by WWF's Wildfinder.
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Additional data source: Animal Diversity Web