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A 2013 systematic review in Nature Communications of data from 17 studies found that feral and domestic cats are estimated to kill billions of birds in the United States every year. [6] In a global 2023 assessment, cats were found to prey on 2,084 different species, of which 347 (or 16.5%) were of conservation concern.
Whatever your views on outdoor cats, it’s unavoidable that indoor cats are safer to birds – a study from 2013 found that domestic cats kill billions of birds and mammals each year.
The SAWC estimated that domestic cats kill 27 million birds in the UK each year. It advised the government to consider a range of measures, including keeping domestic cats indoors or on leashes ...
According to the American Bird Conservancy, "Cats kill 1.3 to 4 billion birds each year in the U.S. alone." Additionally, "outdoor domestic cats are a recognized threat to global biodiversity.
[139]: 153 Domestic cats are a major predator of wildlife in the United States, killing an estimated 1.3 to 4.0 billion birds and 6.3 to 22.3 billion mammals annually. [ 140 ] Certain species appear more susceptible than others; in one English village, for example, 30% of house sparrow mortality was linked to the domestic cat. [ 141 ]
As of 2016, some 3.8 million domestic cats and up to 6.3 million feral cats continue to live in Australia. [2] [3] [needs update] The Invasive Species Council has estimated that each year domestic and feral cats in Australia kill 1,067 million mammals, 399 million birds, 609 million reptiles, 93 million frogs, and 1.8 billion invertebrates. [4]
Cats have a natural hunting instinct that can disrupt ecosystems by killing birds, which can lead to imbalances in predator-prey dynamics, Indiana Audubon’s Whitney Yoerger said. Program helps ...
However, the mass killing of sparrows, in particular, had severe ecological consequences, leading to an increase in crop-eating insects. 1961: Official End of the Campaign In 1961, the Chinese government officially declared the end of the Four Pests Campaign. By this time, it was evident that the campaign had led to ecological imbalances and ...