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http://dx.doi.org/10.7235/hort.2012.11065

Fruit Dieting Behavior of Black-billed Magpies, Azure-winged Magpies, and Brown-eared Bulbuls in the Cage  

Song, Jang-Hoon (Pear Research Station, National Institute of Horticultural & Herbal Science)
Shin, Gil-Ho (Jeollanam-do Agricultural Research & Extention Services)
Cho, Young-Sik (Pear Research Station, National Institute of Horticultural & Herbal Science)
Park, Jang-Hyun (Pear Research Station, National Institute of Horticultural & Herbal Science)
Lee, Han-Chan (Pear Research Station, National Institute of Horticultural & Herbal Science)
Publication Information
Horticultural Science & Technology / v.30, no.1, 2012 , pp. 85-89 More about this Journal
Abstract
To investigate the bird's dieting behavior for several fruits in orchards, this study was carried out in 2008. Black-billed magpies (Pica pica), azure-winged magpies (Cyanopica cyanus), and brown-eared bulbuls (Hypsipetes amaurotis) made their unique marks on the surface of pear and apple fruits; black-billed magpies pecked fruits strongly and left round holes with perpendicular angle, whereas those of azure-winged magpies and brown-eared bulbuls were sack-shaped with narrow neck and marked unique stripes on the skin. For the fruits of pear and apple from bagging practices, the birds showed different foraging behavior; black-billed magpies could injure all kinds of fruits whether with paper bags or not, but azure-winged magpies and brown-eared bulbuls could not attack the fruits with paper bag. Azure-winged magpies and brown-eared bulbuls preferred pear fruits to those of apples and satsuma mandarins in the cage trials. To reduce the injuries by azure-winged magpies and brown-eared bulbuls on pear and apple fruit, wrapping bag should not be impaired. Introducing azure-winged magpies to Cheju should be prohibited for the potential citrus injury by them.
Keywords
Citrus unshu; Malus domestica; Pyrus pyriforia;
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