According to foreign media reports, summer is coming to an end, which means that the leaves will wither, the air will become colder, and the birds will start their winter tour. Researchers at New Mexico State University are trying to figure out what happened. They say the strange bird’s death began in August. They also believe that wildfires in California and smog and ash drifting across much of the United States could be a factor. < / P > < p > according to CNN, a large number of dead birds began to appear near the Baisha missile test site and Baisha National Monument at the end of August. At the time, hundreds of birds were found, but researchers now believe that the total number of unexplained bird deaths could be millions. < / P > < p > shortly after that, reports of bird deaths began to appear everywhere in the area, and another oddity of the story is that eyewitnesses said they had discovered abnormal behavior of birds before mass deaths began. It is unusual for birds that usually live on trees or shrubs to look for insects on the ground, while some birds, like swallows, allow humans to walk directly to them. < / P > < p > there is a theory that these birds are forced to migrate early due to forest fires, and they may not be ready for long-distance migration to the south. Because they don’t store enough fat, they may die of fatigue, which may explain why they have conditions similar to disorientation and fatigue. However, the birds began to behave strangely before the wildfire spread, so the theory did not fully meet the requirements of scientists. “We’ve been seeing isolated mortality since August, so there are other factors at work in addition to weather factors, but we don’t know why,” Martha Desmond of New Mexico State University told CNN. So it’s troublesome. ” < / P > < p > “it’s terrible,” Desmond, “the number is six digits. Just from what we see, we know that this is a very big event, hundreds of thousands or even millions of dead birds. ” < p > < p > iPad air 4 running point data release: A14 bionic easily beat its rivals under single core and multi-core workload < A= target=_ blank>Global Tech