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- <text id=89TT1952>
- <title>
- July 31, 1989: Attack Of The Killer Cats
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1989
- July 31, 1989 Doctors And Patients
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- ENVIRONMENT, Page 46
- Attack of the Killer Cats
- </hdr><body>
- <p>A study shows that those lovable furry pets decimate wildlife
- </p>
- <p> While fond of his cat, British biologist Peter Churcher
- looked askance at its practice of dragging small mammals and
- birds into his Bedfordshire house and devouring them under the
- kitchen table "to the sound of crunching bones." One of
- Churcher's associates, John Lawton, a professor of community
- ecology at the University of London, was similarly impressed by
- his own cat's predatory pursuits. With the natural curiosity of
- true scientists, they decided to look further into the
- depredations of felines. If all the domestic cats in Britain
- caught as much prey as theirs did, the two men reasoned, they
- could be having a "very significant" impact on the environment.
- </p>
- <p> Hyperbole? Not at all. Writing in the July issue of Natural
- History, Churcher and Lawton estimate that Britain's 5 million
- house cats wreak an annual toll of some 70 million animals and
- birds.
- </p>
- <p> In reaching this astonishing conclusion, the intrepid
- investigators used only the most rigorous scientific methods.
- Choosing Churcher's small village as their test site, they
- conducted a feline census and found that 78 cats resided in the
- community's 173 houses, "a slightly higher incidence of cat
- owning than in Britain as a whole." Owners of 77 of the cats
- agreed to cooperate. Each was given a supply of consecutively
- numbered polyethylene bags labeled with his cat's code letter
- and asked to store whatever was left of any prey his pet brought
- home.
- </p>
- <p> For a full year the scientists made weekly rounds of the
- village, collecting bags and identifying the remains. If the
- cat had consumed the entire catch, the victim was simply
- recorded as an "unknown." Otherwise, the identification process
- was simple, the scientists report, although "initially -- the
- study began during the summer months -- it was rather smelly."
- Surprisingly enough, they write, "the villagers were much less
- squeamish than we had expected." In fact, some went about their
- assigned task with great gusto, placing their cats' trophies in
- home freezers to await collection.
- </p>
- <p> Tallying and analyzing their data at the end of a year, the
- investigators found that the cats had claimed almost 1,100
- items of prey, 64% consisting of small mammals: mostly wood
- mice, field voles and common shrews, interspersed with an
- occasional rabbit, weasel or pipistrelle bat. The remaining
- victims, all birds, included sparrows, song thrushes, blackbirds
- and robins.
- </p>
- <p> Delving further into the sparrow toll, which accounted for
- 16% of the total feline catch, the scientists concluded that
- from a third to a half of all sparrow deaths were attributable
- to cats. Extrapolating these figures, they estimated that cats
- kill at least 20 million birds a year in Britain. "Yet," write
- the authors indignantly, "we are supposed to be a nation of bird
- lovers, many of whom keep cats but still castigate bird hunters
- and trappers on the continent of Europe."
- </p>
- <p> Impressive as these statistics are, the scientists note,
- the carnage may be even worse. They cite an American study
- indicating that house cats bring only about half their victims
- home.
- </p>
- <p> Will cat fanciers find these conclusions unsettling?
- Evidently not. When the authors' work was published earlier in
- a scientific journal, including the fact that a few Bedfordshire
- cats had each contributed as many as 100 items of prey to the
- study, they received letters from other cat owners boasting of
- their own pets' prowess. The record, they report, is currently
- held by a cat from Dorset that dragged in more than 400 little
- creatures in one year. The scientists are aghast. "These proud
- owners," they report, "seem quite unperturbed by the slaughter."
- </p>
-
- </body></article>
- </text>
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