…Most of the eggs are white or cream-colored. Temperate birds tend to lay two eggs per clutch, while tropical birds tend to lay one egg per clutch. The male and female take turns incubating the eggs for 14 to 30 days. The chicks are born naked, with only a few soft white feathers, and are raised on a cheese-like substance secreted from the inner walls of the parents' pouches (commonly known as pigeon milk). They live in more or less flocks outside of the breeding season. … *Some of the terminology that mentions "pigeon milk" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…卵はほとんどが白かクリーム色で,温帯産のものは1腹2卵,熱帯産のものは1腹1卵が多く,雌雄交替で14~30日ほど抱卵する。雛はやわらかくて白い羽毛がまばらにあるだけの裸で生まれ,親の嗉囊(そのう)の内壁から分泌されるチーズ様のもの(一般にピジョンミルクpigeon milk,ハトの乳と呼ばれている)で育てられる。繁殖期以外は多少とも群れをつくっている。… ※「pigeon milk」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 |
...Due to the sedimentation of the Takahashi Rive...
It is one of the six schools of Indian philosophy...
…When the Jews were expelled from Spain in 1492, ...
…General term for animals belonging to the Tremat...
...The Administrative Inspection Bureau was respo...
...It is a disease in which the blood flow in the...
It means "what ought to be" or "wh...
A short story by Nakano Shigeharu. Published in Ke...
...It is distributed from off the coast of Choshi...
...Therefore, it is natural that chemists should ...
A Dajokan talisman to implement the Imperial will ...
...Information from overseas brought by Qing merc...
The League was formed on September 26, 1815, at t...
A general term for animals belonging to the Dasip...
…Advanced thermal reactor A heavy water moderated...