As indicated by an examination, shriveling in the course of the most recent four decades, birds have steadily declined in size because of temperatures increasing as a result of climate change. The entirety of the 52 types of feathered creature in the examination indicated diminished body size and mass over the forty years of records, with a normal 2.4 percent decline in leg bone length. The bird span increased by an average of 1.3 percent, though scientists believe that birds can continue to migrate long distances despite the fact that a smaller body produces the energy needed for flight.
As a modern phenomenon, the term ‘ climate change ‘ was hardly on the horizon. The results of the study indicate how important long-term data sets are for the recognition and evaluation of patterns emerging from environmental changes.
The size of the birds depends on their climatic temperature. Winged animals will in general be bigger in cooler atmospheres, since a bigger weight can assist them with staying warm. The researchers say the reduction in size is consistent with the progressive temperature warming in Chicago, where the study was conducted.