栗嘴巨嘴鳥 巢穴中的栗嘴巨嘴鳥 今天我們要去哥斯達(dá)黎加，這只栗嘴巨嘴鳥正在樹洞里筑巢。這是哥斯達(dá)黎加最大的栗嘴巨嘴鳥，很難找到一個(gè)合適的空間，因此交配對(duì)通常會(huì)使用一個(gè)廢棄的啄木鳥巢或在一棵樹腐爛的部分找到一個(gè)大洞。這個(gè)看起來(lái)很完美-合身。那個(gè)雌鳥會(huì)下兩到四個(gè)蛋，然后雌雄輪流孵化，直到兩周后小雞孵化。不，剛出生的小雞沒有那些巨大的鈔票，它們天生就瞎了，光著身子，有著短的鈔票，當(dāng)它們分享這個(gè)小空間的時(shí)候，必須讓它們的父母高興。大約6周后，雛鳥會(huì)自己進(jìn)入森林，用喙尖摘水果，有時(shí)會(huì)把水果拋到空中，讓它掉到喉嚨里。

原文:

Today we're visiting Costa Rica, where this magnificent chestnut-mandibled toucan is fashioning a nest in the cavity of a tree. It can be hard to find a suitable space for this, the largest toucan in Costa Rica, so mating pairs will often use an abandoned woodpecker's nest or find a large hole in a decaying part of a tree. This one seems perfectly form-fitting.The female will lay two to four eggs and then both sexes will take turns incubating them until the chicks hatch 2 weeks later. And no, the newborn chicks don't have those ginormous bills—they're born blind and naked, with short bills—something that must please their parents while they share this small space. After about 6 weeks, the fledglings will make their own way into the forest, plucking fruit with the tips of their bills, sometimes tossing it into the air and letting it fall into their throats.

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