Research on European robins shows that human noise pollution makes the birds aggressive. Urban robins were more aggressive toward a new bird than their rural counterparts. According to researchers, what makes urban birds more aggressive is the noise they are used to.
Scientists placed a 3D model of a chirping robin in a room with male robins. They added traffic sounds. The researchers then examined Robbins’ responses. They wrote their findings in a scientific journal Behavioral ecology and sociobiology.
Urban robins responded more physically to the 3D bird than rural robins. Researchers believe that birds from the city are more aggressive because their daily interactions are disrupted by construction noise and traffic noise.
When the researchers turned on the traffic sounds, the robins from the city began to sing more quietly. Maybe they do it because they are used to being loud. They learned to wait for the weather to calm down. Despite their quiet singing, city birds typically react more aggressively to intruders.
Rural robins, on the other hand, responded more aggressively to traffic noises. Perhaps they wanted to make up for the fact that they were less intelligent by blowing vigorously and showing off their red feathers.
It is common for birds to respond competitively to newcomers. They adjust their singing or respond physically to mark their territory.
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