山階鳥類学雑誌
Online ISSN : 1882-0999
Print ISSN : 1348-5032
ISSN-L : 1348-5032
報告
ブナ科堅果に対するイカル Eophona personata の採食行動
吉川 徹朗
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ジャーナル フリー

2007 年 38 巻 2 号 p. 143-146

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Over a 2-day period, 30-70 Grosbeaks Eophona personata were observed feeding on acorns of several fagaceous species (Quercus glauca, Castanopsis cuspidate and its variation C. cuspidate var. sieboldi) in the understory of evergreen broadleaved forest at Funaokayama Hill, Kyoto City. Grosbeaks cracked the cupula and pericarps of acorns with their bills, and fed only on the embryos and cotyledons inside. This feeding behavior on synzoochorous seeds is very similar to that observed when feeding on anemochorous and endozoochorous seeds.

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© 2007 公益財団法人 山階鳥類研究所
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