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Some species Hummingbirds are adapting to the city life in evolutionary changes in their physiology, influenced by the spread of artificial alcohol fountains. According to some biologists, it may show that these birds are on the way to become Commons With humans – to be beneficial from living closely as well – in the urban areas like pigeons.
Ay Recent research The size and shape of the chanchu of Anna Hummingbirds found (Bring the calipts), A native species of North America has changed. A Hummingbird Chachi is naturally long and slender to access the nectar located in deep interior flowers. However, in recent decades, the church of the urban Anna Hummingbirds installed outside the house has developed significantly long and larger for access to better access to better access, which has expanded in urban areas. This adaptation suggests that these feeders provide more food to hummingbirds than nectar-filled flowers.
In this survey, which has been reported for the last 300 years, the museum samples have been reported, they also found that men have been developing more sharp, more pointing chasu to compete with other Hummingbirds to access this sugar-filled fountain.
The population of these Hummingbirds expanded to California at the same time as the city centers were established where the city centers could be fed. Researchers have discovered that the population density Bring the calipts Over time it has grown and it has been found that it seems to be associated with the expansion of the fountain and the nectar producing eucalyptus tree, both were introduced by humans in the region.
These rhetoric changes in hummingbirds have occurred quickly. According to the survey, Bring the calipts The population was very different in the 5th, when the bird bills already started to grow. In just 20 years, the equivalent of about 10 generations of this bird, the evolution has left its mark, the authors note.
To manage the research, the team used to analyze samples stored in museums as well as all 58 California Country between 1938 and 2019. They also turn to old newspaper ads to estimate the number of feeders used in the last century. Eventually, they have created a counting model to predict the Hummingbird expansion, considering the presence of feeding and the presence of eucalyptus trees.
