東藍(lán)鴝 四只東藍(lán)鴝 這只矮胖的四人組在北卡羅來(lái)納州的暴風(fēng)雪中被困，是一群東藍(lán)鴝，三種東藍(lán)鴝中分布最廣的一種。(另外兩個(gè)是西部和山區(qū)。)東藍(lán)鴝的分布范圍很廣——從加拿大南部到中美洲的落基山脈以東，再到大西洋和墨西哥灣。你可以在草地、森林空地、草地等地方發(fā)現(xiàn)它們。

所有的東藍(lán)鴝都是洞巢鳥(niǎo)，這意味著它們?cè)跇?shù)洞里安家，在啄木鳥(niǎo)等大鳥(niǎo)騰出的洞里安家，以及在被稱(chēng)為巢箱的人工巢里安家。20世紀(jì)初，由于棲息地的喪失和外來(lái)物種的引入，在爭(zhēng)奪筑巢洞的競(jìng)爭(zhēng)中擊敗了東藍(lán)鴝，導(dǎo)致它們的數(shù)量急劇下降，巢箱在幫助它們恢復(fù)數(shù)量方面發(fā)揮了重要作用。加入環(huán)保組織和熱情的后院觀(guān)鳥(niǎo)者吧。他們專(zhuān)門(mén)為藍(lán)知更鳥(niǎo)搭建巢箱，為這些色彩斑斕的畫(huà)眉提供必要的庇護(hù)。

這個(gè)成功的保護(hù)故事使東藍(lán)鴝成為“大后院鳥(niǎo)類(lèi)統(tǒng)計(jì)”的完美吉祥物?！按蠛笤壶B(niǎo)類(lèi)統(tǒng)計(jì)”是由康奈爾鳥(niǎo)類(lèi)學(xué)實(shí)驗(yàn)室(Cornell Lab of Ornithology)和國(guó)家?jiàn)W杜邦學(xué)會(huì)(National Audubon Society)贊助的一個(gè)在線(xiàn)公民科學(xué)項(xiàng)目，幫助監(jiān)測(cè)野生鳥(niǎo)類(lèi)數(shù)量。想?yún)⑴c嗎?只要數(shù)一數(shù)你所在地區(qū)看到的鳥(niǎo)類(lèi)，并在2021年2月12日至15日期間在網(wǎng)上分享結(jié)果就行了。觀(guān)鳥(niǎo)快樂(lè)!

原文:

This chunky foursome caught in a North Carolina snowstorm is a group of eastern bluebirds, the most widespread of the three types of bluebird. (The other two are the western and mountain.) The eastern bluebird range covers a wide area—east of the Rocky Mountains from southern Canada down to Central America, then over to the Atlantic Ocean and Gulf of Mexico. You can spot them in grasslands, forest clearings, meadows, and the like.

All bluebirds are cavity nesters, which means they make their homes in the hollows of trees, in holes vacated by bigger birds like woodpeckers, and in artificial nests called nest boxes. Nest boxes played a big role in helping the eastern bluebird population rebound after a precipitous decline in the early 20th century due to habitat loss and the introduction of nonnative species that out-competed them for nesting holes. Enter conservation groups and passionate backyard birders. They put up nest boxes specifically designed for bluebirds that provided needed shelter for these colorful thrushes.

This conservation success story makes the eastern bluebird the perfect mascot for the Great Backyard Bird Count, an online citizen science project sponsored by the Cornell Lab of Ornithology and the National Audubon Society that helps monitor wild bird populations. Want to participate? Just count the birds you see in your area and share the results online between February 12-15, 2021. Happy birding!

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