We all are familiar with the concept of evolution. For those who are not let us tell you first that evolution is the gradual process or the change in the characteristics of certain species over a period of time. It is a slow process. Darwin who has his prominent name in the field of evolution as he gave many theories which are accessible and right. One of the popular theory was of the Darwin finches. He studied the Darwin finches on Galapagos Island.
He concluded after observing the different little black birds beaks which were having the same ancestors but eventually evolved their beaks of different shapes, sizes according to the type of food they used to get in different locations. In the 19th century, he said that the ecosystem is the main factor which influenced the speciation in those birds. He said how the bird ate the forages build its skull shape in that way. However, in the latest study, we got to know that food which they were getting and the skull shape are not strongly connected in the context of evolution.
This study was led by the UCL and the National History Museum, and now they are rewriting how the ecosystem is responding to affect the pattern of evolution. Dr. Ryan Felice (UCL Biosciences), who is one of the authors of the study said “If we apply Darwin’s conclusion for different kinds of birds who primarily eat fish, pelicans and penguins should have exactly the same head and beak shape, as they both use their beaks to eat fish. However, pelicans have a long beak and large throat pouch, while penguins’ beaks are comparatively small,”
“Although they eat the same thing, pelicans and penguins acquire their prey in different ways, demonstrating the important role behavior plays in cranial evolution.”