As the days are passing by, birds are becoming smaller in size and shape. The particular analysis has been brought to the surface by the scientists who examined it on a migratory bird that died after colliding into buildings in Chicago.
Since the year 1978, the Field Museum ornithologist, David Willard has been measuring the Windy City’s dead birds. From the reports that surfaced from his research says that their legs are continuously getting shorter, their body weight is steadily falling, and their wings are getting slightly longer.
According to the study, such changes are considered to be quite common among the other species of birds. Thus, some scientists have derived the conclusion that it is happening due to a change in the climate.
The temperatures are becoming warmer with the passing time, and this is the major factor that is affecting the birds.