Browsing the archives for the Peter Blancher tag

What’s Several Billion Birds, Among Friends?

Frequently cited estimates for birds killed by cats in the U.S. actually exceed the number of birds estimated to be in the country. Documents obtained via Freedom of Information Act raise as many questions as they answer.

As I pointed out recently, the annual mortality estimates proposed in the 2013 paper, “The impact of free-ranging domestic [...]

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Appealing to Our Better Nature

It’s not every day that I hear from somebody whose work I’ve criticized. (In fact, I rarely receive a response from those I reach out to for comments or clarification.) Imagine my surprise, then, when I received an e-mail from somebody involved with Nature Canada’s “cats indoors” campaign who was interested in better understanding my [...]

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O (Environment) Canada!

In “Estimated Number of Birds Killed by House Cats (Felis catus) in Canada,” published late last year in Avian Conservation and Ecology, Environment Canada research scientist Peter Blancher estimates that cats—owned and unowned—“kill between 100 and 350 million birds per year in Canada,” and suggests that this level of predation “is probably the largest human-related [...]

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