Cats kill billions of birds every year in United States ,a new study has revealed.The researchers say the cats kill billions of birds and millions of tiny rodents and mammals.
The research findings published in the journal Nature Communications Tuesday ,January 29 ,showed that cats kill between 1.4 billion and 3.7 billion birds and between 6.9 billion and 20.7 billion small mammals, such as meadow voles and chipmunks.
Study co-author, Pete Marra an animal ecologist with the Smithsonian Conservation Biology Institute says it’s hard to know exactly how many birds live in the United States, and the staggering number of bird deaths may account for as much as 15 percent of the total bird population.
Marra and his team looked at the impact of the feline population, one of the biggest putative causes of bird demise in the country.
While past studies had used critter cams or owner reports to estimate the number of birds killed by cats, those studies were usually small and not applicable to the entire country, Marra told LiveScience.
For this broader analysis, the team first looked at all prior studies on bird deaths and estimated that around 84 million owned-cats live in the country, many of which are allowed outdoors. “A lot of these cats may go outside and go to 10 different houses, but they go back to their house and cuddle up on Mr. Smith’s lap at night,” Marra said.