囧研究：早起的鸟儿有虫吃？可不一定！
<p><span word="The">The</span> <span word="early">early</span> <span word="bird">bird</span> <span word="really">really</span> <span word="does">does</span> <span word="catch">catch</span> <span word="the">the</span> <span word="worm">worm</span>… <span word="but">but</span> <span word="he">he</span> <span word="saves">saves</span> <span word="it">it</span> <span word="for">for</span> <span word="dinner">dinner</span>.</p><p>早起的鸟儿真的是在捉虫，但却在晚上才吃掉。</p><p><span word="Blue">Blue</span> <span word="tits">tits</span>, <span word="great">great</span> <span word="tits">tits</span> <span word="and">and</span> <span word="other">other</span> <span word="small">small</span> <span word="garden">garden</span> <span word="birds">birds</span> <span word="scout">scout</span> <span word="for">for</span> <span word="food">food</span> <span word="in">in</span> <span word="the">the</span> <span word="morning">morning</span> <span word="but">but</span> <span word="only">only</span> <span word="return">return</span> <span word="to">to</span> <span word="eat">eat</span> <span word="it">it</span> <span word="in">in</span> <span word="the">the</span> <span word="late">late</span> <span word="afternoon">afternoon</span>, <span word="a">a</span> <span word="study">study</span> <span word="found">found</span>.</p><p>研究发现，蓝山雀、大山雀和其他花园鸟类在早上找食，但只在临近傍晚的时候才吃掉。</p><p><span word="The">The</span> <span word="Oxford">Oxford</span> <span word="University">University</span> <span word="researchers">researchers</span> <span word="believe">believe</span> <span word="the">the</span> <span word="strategy">strategy</span> <span word="allows">allows</span> <span word="them">them</span> <span word="to">to</span> <span word="stock">stock</span> <span word="up">up</span> <span word="on">on</span> <span word="food">food</span> <span word="while">while</span> <span word="avoiding">avoiding</span> <span word="the">the</span> <span word="clutches">clutches</span> <span word="of">of</span> <span word="predators">predators</span>.</p><p>牛津大学的研究人员认为，鸟类用这种方式来囤积食物，同时也为了免于被猎食动物吃掉。</p><p><span word="A">A</span> <span word="full">full</span> <span word="belly">belly</span> <span word="in">in</span> <span word="the">the</span> <span word="morning">morning</span> <span word="would">would</span> <span word="slow">slow</span> <span word="them">them</span> <span word="down">down</span> <span word="in">in</span> <span word="the">the</span> <span word="hunt">hunt</span> <span word="for">for</span> <span word="food">food</span> <span word="and">and</span> <span word="make">make</span> <span word="them">them</span> <span word="easy">easy</span> <span word="prey">prey</span>.</p><p>要是早上吃饱了的话，在找食的时候飞得慢，容易被猎食动物吃掉。</p><p><span word="So">So</span> <span word="they">they</span> <span word="search">search</span> <span word="out">out</span> <span word="food">food</span> <span word="when">when</span> <span word="lean">lean</span> <span word="and">and</span> <span word="lithe">lithe</span> <span word="and">and</span> <span word="then">then</span> <span word="dine">dine</span> <span word="in">in</span> <span word="the">the</span> <span word="evening">evening</span> <span word="to">to</span> <span word="ensure">ensure</span> <span word="they">they</span> <span word="have">have</span> <span word="a">a</span> <span word="big">big</span> <span word="enough">enough</span> <span word="store">store</span> <span word="of">of</span> <span word="fat">fat</span> <span word="to">to</span> <span word="survive">survive</span> <span word="through">through</span> <span word="the">the</span> <span word="night">night</span>.</p><p>所以鸟类趁身子轻盈的时候，在早上出去寻找食物，却在晚上吃掉，这样能保证体内存储大量脂肪来过夜。</p><p><span word="The">The</span> ‘<span word="early">early</span> <span word="bird">bird</span>’ <span word="strategy">strategy</span> <span word="was">was</span> <span word="revealed">revealed</span> <span word="in">in</span> <span word="an">an</span> <span word="experiment">experiment</span> <span word="in">in</span> <span word="which">which</span> <span word="over">over</span> 2,000 <span word="birds">birds</span> <span word="were">were</span> <span word="fitted">fitted</span> <span word="with">with</span> <span word="tiny">tiny</span> <span word="radio">radio</span> <span word="tags">tags</span> <span word="which">which</span> <span word="activated">activated</span> <span word="when">when</span> <span word="they">they</span> <span word="landed">landed</span> <span word="on">on</span> <span word="feeders">feeders</span> <span word="hidden">hidden</span> <span word="in">in</span> <span word="Wytham">Wytham</span> <span word="Woods">Woods</span>, <span word="near">near</span> <span word="Oxford">Oxford</span>.</p><p>针对超过2000只鸟的实验揭示了这种“早起鸟” 捕食策略方式，试验中给鸟儿安装了微型无线电标签，把喂食器藏在牛津附近的威萨姆森林里，鸟儿只要落在喂食器上微型无线电标签就会被激活。</p>
页:
[1]