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Greater horseshoe bat trends for Great Britain

Rhinolophus ferrumequinum

Species factsheetDistribution and abundance

GB-level population trends for greater horseshoe bat from the Hibernation Survey and the Roost Count are shown on this page. 

Population trends are also calculated for greater horseshoe bat at a country-level for England and Wales. This species is not found in Scotland.

 


Hibernation Survey

GB index of greater horseshoe bat population from Hibernation Surveys

Greater horseshoe bat Hibernation Survey GB 2015
Note: The graph above shows the unsmoothed index value for each year (green crosses), the smoothed trend (solid line) and 95% confidence intervals (dotted lines). The smoothed trend for 2015 is shown as a dashed line to indicate that it is provisional.

The smoothed index is currently 113% above the 1999 base year value, equivalent to an annual increase of 4.8%. The smoothed trend showed a consistent increase from the start of the monitoring period until 2012, when the rate of increase slowed. When the provisional smoothed index for 2015 is considered the trend now appears to be leveling out. Overall there has been a significant increase in the smoothed index since the baseline year.

From all years for which data are available (1990-2015), counts from 231 sites contribute to the overall trend analysis (sites surveyed in two or more years with greater horseshoe bat recorded in at least one year).


Roost Count

GB index of greater horseshoe bat population from Roost Counts

Greater horseshoe bat Roost Count GB 2015
Note: The graph above shows the unsmoothed index value for each year (green crosses), the smoothed trend (solid line) and 95% confidence intervals (dotted lines). The smoothed trend for 2015 is shown as a dashed line to indicate that it is provisional.

The smoothed index is currently 126% above the 1999 base year value, equivalent to an annual increase of 5.2%. The smoothed trend has increased consistently since the beginning of the monitoring period, and the provisional smoothed index for 2015 shows this trend continuing. There has been a significant increase in the smoothed index since the baseline year.

Data from 32 sites surveyed between 1997 and 2015 contribute to the trend analysis (sites surveyed in at least two years).


Summary of survey results

Trends from both the Hibernation Survey and Roost Count show a statistically significant increase in the smoothed population index since the baseline year. Overall the population of greater horseshoe bat in Great Britain is considered to have increased since 1999


Distribution and Abundance

The greater horseshoe bat is rare in the British Isles and is confined to south-west England and south Wales. 

Population estimate

The population estimate for this species is considered to be of moderate accuracy, being based on a comprehensive survey inventory.

Country

UK

England

Wales

Scotland

N.Ireland

Number

>6,600

unknown

unknown

does not occur

does not occur

 Source

Battersby et al. 2005

 

 

 

 

 

 


 

References

Battersby. J. (Ed) & Tracking Mammals Partnership. (2005) UK Mammals Species Status and Population Trends. First Report by the Tracking Mammals Partnership. JNCC/Tracking Mammals Partnership, Peterborough.


Return to:

Top of pageSpecies population trendsReport home pageContents page

 

Greater horseshoe bat (Gareth Jones)

 

Greater horseshoe bat factsheet

 

Listen to how a greater horseshoe bat sounds on a bat detector 

 

 

Current distribution of greater horseshoe bat in the UK

(Map taken from 3rd Report under Article 17 on implementation of the Habitats Directive in the UK, JNCC 2013)

Greater horseshoe bat distribution

 

 

 

 

 

 

 

 

 

 

 

 

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