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Providing evidence to improve practice

Individual study: The effectiveness of a simple internal nest box anti-predator device at reducing predation of tit Parus nests by Japanese marten Martes melampus on Mt. Aburayama, Kyushu region, Japan

Published source details

Yamaguchi N., Kawano K..M., Yamaguchi Y. & Saito T. (2005) Small protection plates against marten predation on nest boxes. Applied Entomology and Zoology, 40, 575-577


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

Physically protect nests with individual exclosures/barriers or provide shelters for chicks of songbirds Bird Conservation

A replicated before-and-after study from 1999-2000 in a mixed forest in Kyushu, Japan (Yamaguchi et al. 2005) found that the proportion of nest box broods (unprotected nest boxes were predated in 2006 either, but that these were all further away (>300 of varied tits Parus varius and great tits P. major) predated by Japanese martins Martes melampus fell from 12% (92 broods) to 2% (118 broods) and the overall success rate of nests increased from 29% to 44% following the installation of small wooden blocks directly below the entrance hole of the nest boxes in 2000. Overall predation rates fell from 46% to 28% and the number of broods lost to birds fell from three to zero (although this was not significant). The number of broods lost to snakes did not change between years.