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Serotine

Eptesicus serotinus

Distribution and abundance; Legal and Conservation Status; Population Trends

Description

Serotine (Hugh Clark)

Serotine factsheet

Listen to how serotine sounds on a bat detector 

 

The serotine is one of the UK's largest bats and often emerges early in the evening. It has a leisurely flight and feeds around vegetation, along treelines or woodland edges for example. It eats small flies and moths and also larger dung beetles and chafers. It mainly roosts in older houses and buildings that have high gable ends and cavity walls. Data on the population trends of the serotine is collected through the Field Surveys and Roost Counts. 

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Distribution and abundance

Serotine is an uncommon species, with a distribution mostly limited to areas south of a line drawn from the Wash across to south Wales. The maps show the current mapped distribution in the UK on the left and the modelled range in the UK on the right. Maps are taken from 2nd Report under Article 17 on implementation of the Habitats Directive (JNCC 2007).

Serotine distribution map Serotine modelled range

Population estimate 

Note: The population estimates are considered to be poor and should be treated with caution. Estimates are based on very limited population data and rely on expert opinion only

Country UK England Wales Scotland N.Ireland
Number 15,000  15,000 0
 Source  Harris et al. 1995 Harris et al. 1995       

  


Legal and Conservation Status

All bat species in the UK are legally protected, both by domestic and international legislation.

Click here for a summary table of all legislation and conventions relating to bat species

Serotine colonies are reliant on buildings for roosting, and the population is therefore vulnerable to building development and renovation, exclusion and toxic timber treatment. It is a beetle specialist and factors affecting habitats such as unimproved grassland that support chafer populations may also impact on serotine populations. 


Click here to continue to the population trends for serotine 


 

References

Harris S., Morris, P., Wray, S. & Yalden, D. (1995) A review of British mammals: population estimates and conservation status of British mammals other than cetaceans. JNCC, Peterborough.

 

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