Love is in the air this spring in the eastern United States, where billions of cicadas are appearing in the biggest emergence event since 2004.
The insects are part of a group called Brood X — also known as the Great Eastern Brood — which is expected in a geographical range stretching from Tennessee to New York.
These cicadas have been subterranean for 17 years, tunneling and feeding beneath the soil. When they are back above ground, finding a mate will be, understandably, a top priority. The loud, buzzing drone cicadas make is actually a mating song emitted by male insects, flexing a drumlike organ called a tymbal.
"It's all boys calling girls," said entomologist Eric Day of Virginia Polytechnic Institute and State University extension. "First you get a few here and there, then what happens is they start chorusing — there's so many of them that the cicada calls all combine in this huge chorus."
【 在 rbs (jay) 的大作中提到: 】 : 公知了叫母知了 : Love is in the air this spring in the eastern United States, where billions : of cicadas are appearing in the biggest emergence event since 2004. : The insects are part of a group called Brood X — also known as the Great : Eastern Brood — which is expected in a geographical range stretching from : Tennessee to New York. : These cicadas have been subterranean for 17 years, tunneling and feeding : beneath the soil. When they are back above ground, finding a mate will be, : understandably, a top priority. The loud, buzzing drone cicadas make is : actually a mating song emitted by male insects, flexing a drumlike organ : ...................
据马里兰大学名誉昆虫学教授，美国昆虫学学会会员Michael J. Raupp说：这些蝉的生命周期非常奇怪，这使它们不受大多数捕食者的侵害，因为它们一直埋在地下。这些周期性蝉不一定只在他们生命的第17个春天出现。根据地区的不同，有些蝉会选择在第13年（4月下旬至6月初之间的某个时间）出现。
这位教授重申蝉是无害的：它们不会咬人或蛰人。但是，他指出，我们仍然不应该让我们的狗在散步时吃太多的蝉。虽然这些蝉十分“美味又有营养”。人也同样需要注意，任何对虾过敏的人都应避免食用，因为它们的外骨骼都是相同的。
公知了叫母知了
Love is in the air this spring in the eastern United States, where billions of cicadas are appearing in the biggest emergence event since 2004.
The insects are part of a group called Brood X — also known as the Great
Eastern Brood — which is expected in a geographical range stretching from
Tennessee to New York.
These cicadas have been subterranean for 17 years, tunneling and feeding
beneath the soil. When they are back above ground, finding a mate will be,
understandably, a top priority. The loud, buzzing drone cicadas make is
actually a mating song emitted by male insects, flexing a drumlike organ
called a tymbal.
"It's all boys calling girls," said entomologist Eric Day of Virginia
Polytechnic Institute and State University extension. "First you get a few
here and there, then what happens is they start chorusing — there's so many of them that the cicada calls all combine in this huge chorus."
蝉和虾的壳居然相同？
公知叫。。。
【 在 rbs (jay) 的大作中提到: 】
: 公知了叫母知了
: Love is in the air this spring in the eastern United States, where
billions
: of cicadas are appearing in the biggest emergence event since 2004.
: The insects are part of a group called Brood X — also known as the Great : Eastern Brood — which is expected in a geographical range stretching from
: Tennessee to New York.
: These cicadas have been subterranean for 17 years, tunneling and feeding
: beneath the soil. When they are back above ground, finding a mate will be,
: understandably, a top priority. The loud, buzzing drone cicadas make is
: actually a mating song emitted by male insects, flexing a drumlike organ
: ...................