鸟是人类的朋友。它能够消灭危害农作物的害虫，五颜六色的羽毛，俏皮可爱的动作给我们带来了无尽的欢乐。对于有的人来说，每天早晨能伴着鸟儿欢快清脆的歌声中醒来，别提是多么幸福的一件事了。 Birds are friends of human beings. It can destroy pests that harm crops, colorful feathers, and cute and cute movements bring us endless joy. For some people, it is a happy thing to wake up every morning with the cheerful and crisp song of a bird. 但机场附近的鸟类却是民航人的心头大患。从人类从事飞行活动之初，鸟类就被认为是对飞行活动的一种威胁。飞机被鸟类撞击，轻则航空器表面结构受损，航班返航备降；重则发动机被摧毁造成几百万的经济损失：甚至机毁人亡，后果不堪设想。 But the birds near the airport are the minds of civil aviation people. From the beginning of human activities, birds are considered to be a threat to flight activities. The aircraft is hit by birds, the surface structure of the aircraft is damaged, the flight is returned to spare, the heavy engine is destroyed and millions of economic losses are caused by the destruction of the aircraft, and the consequences are unthinkable. 据FAA（Federal Aviation Administration;美国联邦航空管理局）统计，每年美国有超过1万次鸟击飞机的事件，其中最常见的危害是损伤发动机，这类损伤一年要造成航空业9.5亿美元的损失。同样，近几年我国运输类飞机因鸟击导致的事故征候占总事故征候的很大比例，是数量最多的事故征候类型之一。频繁且严重的鸟击事件使得鸟击事件得到重视，目前国际航空联合会已把鸟击升级为A类航空灾难。鸟击对于民航的打击是沉重的，因此鸟害防治显得尤为重要。 According to the FAA (Federal Aviation Administration) statistics, there are more than 10 thousand bird strikes in the United States each year. The most common harm is the damage to the engine, which will cause a loss of $950 million in the airline industry for one year. Similarly, in recent years, the number of accidents caused by bird strike accounts for a large proportion of the total number of accidents, and is one of the largest number of accidents. Frequent and serious bird strikes cause bird strike events to be taken seriously. At present, the international aviation Federation has upgraded bird strike to category a aviation disaster. Bird strike is a heavy blow to civil aviation, so bird pest control is particularly important. 区区小鸟为何会有如此大的威力？我们可以借助高中物理的动量守恒原理来解释：假设鸟的重量为0.225kg，鸟的飞行速度为150km/h,飞机的飞行速度取700km/h，鸟撞击飞机时间为1s，鸟撞击飞机后相对飞机静止。根据M(V初-V末)=F×t,公式，将上述数据带入可知，该鸟对飞机的作用力为1048N。我们再假设鸟与飞机的接触面积为18cm2 ，根据压强=力/接触面积可知，此时鸟对飞机的作用力就相当于一个重达1048kg的物体砸向飞机，（我们取该物体与飞机的接触面积为180平方厘米)。 Why does a little bird have such a great power? We can explain the principle of conservation of momentum in high school physics: the weight of the bird is 0.225kg, the flying speed of the bird is 150km/h, the flight speed of the aircraft is 700km/h, the bird impingement time is 1s, and the bird is still resting relative to the plane after the bird hits the plane. According to M (V initial -V end) =F * t, the formula is used to bring the above data into the known aircraft, and the force acting on the aircraft is 1048N. We assume that the contact area of the bird and the aircraft is 18cm2. According to the pressure = force / contact area, the force of the bird at this time is equivalent to an object that weighs 1048kg. (we take the contact area of the plane to 180 square centimeters). 如此看来，鸟儿对于高速飞行的航空器来说威力无疑一枚炮弹。来看看这些触目惊心，血淋漓的画面吧。 In this way, the bird has no doubt a missile for the high speed aircraft. Let's take a look at these shocking pictures of blood dripping.