They have to keep on moving. 它们必须不停地迁徙 The swarm travels with the wind - 沙漠蝗御风而行 it's the most energy-saving way of flying. 这是最省力的飞行方式 Following the flow of wind means that they're always heading toward areas of low pressure, 随着风向迁徙...
As the vegetation in one place begins to run out 当一个地方的植物即将吃光时 the winged adults release pheromones - scent messages, 长着翅膀的成虫便释放出信息素 即一些气味信号 which tell others in the group that they must move on. 提醒蝗群中的其它成员它们应该动身了 And when groups merge, 蝗群合...
the winged adults release pheromones - scent messages, 长着翅膀的成虫便释放出信息素 即一些气味信号 which tell others in the group that they must move on. 提醒蝗群中的其它成员它们应该动身了 And when groups merge, 蝗群合并之后 they form a swarm. 形成了一团蝗虫云 An adult locust eats its entire...
which tell others in the group that they must move on. 提醒蝗群中的其它成员它们应该动身了 And when groups merge, 蝗群合并之后 they form a swarm. 形成了一团蝗虫云 An adult locust eats its entire body weight every day, 成虫每天的进食量相当于自己的体重 and a whole swarm can consume literal...
And when groups merge, 蝗群合并之后 they form a swarm. 形成了一团蝗虫云 An adult locust eats its entire body weight every day, 成虫每天的进食量相当于自己的体重 and a whole swarm can consume literally hundreds of tonnes of vegetation. 而整团蝗虫云能消耗掉数百吨植物 They have to keep on...
They find new feeding grounds by following the smell of sprouting grass. 它们循着萌发的草香寻找新的用餐场所 Normally it takes four weeks for hoppers to become adults, 一般说来 若虫需要 经过4周才能变成成虫 but when the conditions are right as now 但如果条件允许 譬如现在 their developme...
Normally it takes four weeks for hoppers to become adults, 一般说来 若虫需要 经过4周才能变成成虫 but when the conditions are right as now 但如果条件允许 譬如现在 their development switches to the fast track. 它们的生长过程就会切换到快车道 As the vegetation in one place begins to run...
but when the conditions are right as now 但如果条件允许 譬如现在 their development switches to the fast track. 它们的生长过程就会切换到快车道 As the vegetation in one place begins to run out 当一个地方的植物即将吃光时 the winged adults release pheromones - scent messages, 长着翅膀的成...
their development switches to the fast track. 它们的生长过程就会切换到快车道 As the vegetation in one place begins to run out 当一个地方的植物即将吃光时 the winged adults release pheromones - scent messages, 长着翅膀的成虫便释放出信息素 即一些气味信号 which tell others in the group that t...
There is no other species on the planet that responds as quickly and as dramatically to the good times as the desert locust. 好日子到来时 地球上没有其它物种 能像沙漠蝗那样迅速而又戏剧性地作出反应 Eggs that have remained in the ground for 20 years begin to hatch. 在地下埋藏了20年的虫...