Molothrus
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…As for social life, there are those that are always alone in pairs and those that live in groups and breed in colonies. Those that breed in colonies are generally polygynous, and the cowbird genus Molothrus is promiscuous and has the habit of brood parasitism. Nests are also extremely varied, with simple cup-shaped nests built on the ground on grasslands or in thickets, but some species build magnificent pouch-shaped nests that hang from branches. … *Some of the terminology that mentions "Molothrus" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
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…社会生活は，つねに単独かつがいでいるものと，群れで生活し，集団繁殖するものとがある。集団繁殖するなかまは一般に一雄多雌で，またコウウチョウ属Molothrusは乱婚で托卵の習性がある。巣もきわめて変化に富み，簡単なものはわん形の巣を草原の地面ややぶの中につくるが，枝から垂れ下がったみごとな袋状の巣をつくるものもある。… ※「Molothrus」について言及している用語解説の一部を掲載しています。 出典｜株式会社平凡社世界大百科事典 第２版について | 情報 |
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