De cyclus van de veldmuis Microtus arvalis
Drentse vogels , Volume 8 - Issue 1 p. 119- 120
The cycle of common voles is being monitored in Drenthe since late 1986, by analysing the contents of pellets of Long-eared Owls. The population low of 1994 was extended into 1995 (also visible in a high proportion of birds in the Long-eared Owl’s diet). A low in the cycle has a marked impact on breeding success of vole-eaters.
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