A team of scientists from the Smithsonian Conservation Biology and Protection Service Fish and Wildlife Service analyzed the data of previous studies on cats as predators and published them in the journal Nature Communications.
According to information received, the cats are killed each year from 1.4 billion to 3.7 billion birds from 6.9 billion to 20.7 billion mammals. Scientists believe that the greatest threat is just wild and stray cats.
They also indicate that domestic cats also kill birds and animals, and suggest that the owners must take action to reduce the number of their victims, says BBC.
There are detailed descriptions of how the killer instinct domestic cats has led to the destruction of many species of animals on the islands and regions. That they are considered guilty in killing of 33 species.