Dog's are a human's best friend—and a shorebird's worst enemy

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Dog's are a human's best friend—and a shorebird's worst enemy
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The dogs, of course, are just being dogs. ( via hakaimagazine )

Kit saw the ocean for the first time on an iron-skied February afternoon. My wife and I had spent the last three years in eastern Washington State, a region landlocked by 600 kilometers of forests, sagebrush, and wheat fields. For most of that time, we’d cohabited with Kit, an affectionate piebald mutt we’d adopted from a local shelter. Now we were moving to another inland environment—Colorado—via a circuitous road trip that took us through San Francisco.

of up to four billion birds and 22 billion mammals each year in the United States alone. Dogs, by contrast, seem more goofy than lethal, hilariously distant from their wolfish origins. In, author Alan Weisman postulated that, should humankind abruptly disappear, cats would fare just fine. Dogs, however, would vanish alongside their people, unable to survive without their twice-daily bowls of kibble.

Granted, little blue penguins are uniquely easy victims; not even the fastest greyhound is likely to catch an adult gull or dunlin. But the mere presence of dogs is enough to send birds into flight: after all, what’s a poodle but an unusually curly-haired fox, coyote, or wolf? In Chile, scientists have observed dogs pursuing whimbrels, a graceful shorebird that probes mudflats with a long, curved bill.

“Every time you’re forcing birds to fly down the beach, the gas tank is going toward empty,” Newstead says. “If they can’t take in more energy than they’re expending on that beach, they’re eventually going to leave. It’s functional habitat loss.

Why does this matter? Coastal necrophages play a crucial and salutary role, consuming the dead and thus preventing beaches from being strewn with carcasses. What’s more, Maslo says, mobile scavengers like gulls distribute carrion across beaches, spreading out nutrients and thus supporting ecosystems—not unlike dying salmon gifting their nitrogen and phosphorus to the forests in which they spawn. By claiming beaches for their own, dogs inhibit this breakdown and dispersal.

Other scientists have sought the answer in one of humanity’s most powerful motivators: peer pressure. In 2018, researchersin Maine, New York, and South Carolina. People didn’t just let their dogs roam free to exercise and sniff other mutts, they realized, but because social and personal norms sanctioned it. To change the attitudes of dog owners, the researchers proposed modeling different behavioral norms.

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