After a decrease and extinction due to deforestation the population has been reestablished by releasing captive-bred owls. Now about 40 territories are occupied with an average density of 0,8-1,0 territories/10 km2. Highest density: 17 territories/80 km2. © 1985 Verlag der Deutschen Ornithologen-Gesellschaft.
CITATION STYLE
König, C., & Kaiser, H. (1985). Der Sperlingskauz (Glaucidium passerinum) im Schwarzwald. Journal of Ornithology, 126(4), 443. https://doi.org/10.1007/BF01643411
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