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KMID : 0380119990220020065
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Korean Journal of Ecology
1999 Volume.22 No. 2 p.65 ~ p.68
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Vertical Distribution of Foraging Tits in Mixed Species Flocks in Urban Forests
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Lee Sang-Don
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Abstract
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In December-January of 1996-1997 and 1997-1998, information was gathered about vertical distribution of foraging sites of tits in 34 flocks in coniferous and deciduous forests. There was a significant effect of forest type on the distribution of foraging sites of each species. Habitat was classified into 5 height layers vertically: ground, bushes (usually ＜ 1.5 m, up to 3 m), tree layer 1 (up to 1/3 of tree height), tree layer 2 (1/3-2/3 tree height), and tree layer 3 (＞2/3 tree height). There were differences among species: great tit (Parus major) foraged mostly on the ground, coal tit (P. ater) and long-tailed tit (Acrocephalus caudatus) - on the highest tree layer, marsh tit (P. palustris) was often seen on bushes, and varied tit (P. varius) - in tree layer 2. Smaller species used upper and outer parts of trees, suggesting that, like in most other similar studies, larger dominant species prevented smaller species from using inner parts of trees.
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