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Providing evidence to improve practice

Individual study: The value of bat boxes for pygmy pipistrelle Pipistrellus pygmaeus maternity colonies in wetland rice paddies on L’Illa de Buda, Ebro Delta, Cataluna, Spain

Published source details

Flaquer C., Torre I. & Ruiz-Jarillo R. (2006) The value of bat-boxes in the conservation of Pipistrellus pygmaeus in wetland rice paddies. Biological Conservation, 128, 223-230


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Provide bat boxes for roosting bats Bat Conservation

A replicated study in 1999–2004 of a wetland on an island in Catalonia, Spain (Flaquer et al. 2006) found that soprano pipistrelles Pipistrellus pygmaeus used 69 bat boxes of two different designs with an average occupancy rate of 71%, and occupancy increased with time since installation. Occupation rates by females with pups increased from 15% in 2000 to 53% in 2003. Bat box preferences were detected in the breeding season only, with more bats in east-facing bat boxes (average 22 bats/box vs 12 bats/box west-facing), boxes with double compartments (average 25 bats/box vs 12 bats/box single compartment) and boxes placed on posts (average 18 bats/box) and houses (average 12 bats/box). Few bats used bat boxes on trees (average 2 bats/box). A total of 69 wooden bat boxes (10 cm deep x 19 cm wide x 20 cm high) of two types (44 single and 25 double compartment) were placed on three supports (10 trees, 29 buildings and 30 electricity posts) facing east and west. From July 2000 to February 2004, bat boxes were checked on 16 occasions. Bats were counted in boxes or upon emergence when numbers were too high to count within the box.

(Summarised by Anna Berthinussen)