birds

Spring is a time that I always liked. Not for the Horrible processionarybut for the return of the swallows And, above all, of the storks. After a long winter, They return home to nest. Imagine the surprise if, one day, one of those stork appears in your locality with the neck crossed by an 8 -centimeter arrow. Stop imagining because that happened in 1822 in a German city. And far from being an anecdote, it became a key event to unravel the mystery of why birds They disappeared in winter. The doubt. Now it is no mystery and it is something that we learn at school since childhood, but not so many centuries, people did not know why, good at first, the birds were in autumn and reappeared in spring. Those Migratory processes in which even the smallest of the birds rEcorren thousands of kilometers without stopping They were not understood, which forced the thinkers of the time to launch hypotheses and theories that, in the absence of evidence, since they were accepted without further ado. One of the answers was evident. And it could be none than … Alien birds. That is what thought Charles Morton, a Harvard academic who, in the seventeenth century, suggested that the reason why some birds disappeared in winter was because they migrated … to the moon. Most likely you have raised your eyebrow thinking something like “impossible, they could not be so illusory”, but you have to put into the skin of someone who had no way to check the phenomenon and it was still an answer to a real mystery. Because what they knew was that they disappeared for months, but not the place they were going to. And as they saw the moon from Massachusetts, but not Colombia, because the answer was clear. But don’t believe it was the only crazy theory of the time. Aristotle, already in the IV AC theorized about the possibility of being transformed into other species or even shuffled over his hibernation underwater. Morton rejected this idea because it was too fantasy (not like his, of course). The arrow. Morton even calculated that the trip to the moon had a month away and another back, sleeping much of the time and surviving thanks to his body fat. The truth is that, in the absence of better theories, it was not bad (despite my jocular tone, we talked about the seventeenth century and the media they had). However, little by little the idea that these European birds were going to other places during the winter. And the definitive test was brought by a stork. A good day of 1882, north of Germany, someone shot a stork, who fell down and with a capital surprise for those present: he had an 8 -centimeter arrow through his neck. The question was no longer how I could fly with such a breakdown, but where the arrow had come from. Brava PFEILSTORCH. Thus, they took the body of the stork to the University of Rostock, where the researchers examined the projectile and concluded that it was an arrow belonging to some group in the center of Africa. As it was impossible, or tremendously unlikely, that someone launched something like that on European soil, the response became evident: that stork had traveled more than 3,000 kilometers from the point in Africa in which winter had passed and where it was killed in Germany. Baptized as PFEILSTORCHIt was dissected and preserved in perfect condition in the Zoological Collection of the University of Rostock thanks to its undeniable importance in the world of science and ornithology: it was confirmation to the suspicions that, indeed, migratory birds or became anything else, nor slept four months underwater or went to the moon: they traveled to the warmest places during the European winter. Clue. After Pfeilstorch (which means “Flechy stork” or “storks crossed by an arrow”), they found more specimens In Europe with the same characteristics: arrows stuck somewhere in your body. This is not so uncommon in large birds, which show great resilience to wounds that do not compromise flight or its basic functions. Once they are injured, if not seriously, the wound stabilizes and the bird can continue with its life. With the inclusion Of the rings on the legs of the birds by the Danish HC Mortensen in 1899, the researchers systematized the study of specimens to verify that those who flew from Europe before winter, disappeared and then returned, were the same. Thus, we can say that this arrow launched in Africa that landed in Germany was the first bird monitoring system, a coincidence that allowed obtaining the first conclusive data on the migratory practices of the birds. Images | Thula Na In Xataka | Modern cities have become authentic “headlights.” For thousands of birds it is a problem