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Cats kill 2.4 billion birds annually


Domestic cats in the United States kill some 2.4 billion birds and 12.3 billion mammals each year, most of them native mammals like shrews, chipmunks and voles according to the New York Times in a recent article about a new report in the journal Nature co-authored by Peter Marra, an ornithologist at the Smithsonian Conservation Biology Institute. Learn more at the New York Times.


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  • Becky Bell Anger

    Why not people then, one might ask. The hypocrisy is what gets to me.

  • Troy Hansel

    Yes cats kill birds. If these cats are kept indoors they won’t kill birds. There are multiple initiatives to highlight the benefits of keeping cats indoors. Many cat lovers to care about biodiversity. We should focus our energies on getting cats indoors.

  • Atomizer

    Cats kill birds. It’s called nature. WTF are we supposed to do about it?

  • The issue of outside cats is a very difficult one and only when a community has made a decision together does anything substantive happen. In and around Chicago there is a catch, neuter and release program but studies haven’t yet shown a decrease in population or damage, we shall see. For more information go to

  • Argue numbers all you want. This article is spot-on. I just moved into a new house and local cats have killed several marine birds here. Just behind my house was the ripped-up remains of an Ibis, a seagull, and a lesser egret… in just TWO DAYS! I lived in a small town where the adage was; “Shoot the bird-killers. If it is a pet, a simple bowl of milk will get you a new one overnite.” I continue that belief.

  • Michele Glenn

    Impossible. According to the 2012 census figures, there are 313,914,000 people in the U.S. And this study says cats kill 2.4 BILLION birds each year??? The numbers are outrageously skewed; this just isn’t possible. My picture windows kill more birds than all of my cats have during my entire life.

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