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Frans de Waal's opinion on the recent chimp attack
Frans de Waal's opinion on the recent chimp attack From Scientific American
Are captive chimpanzee attacks on humans common? Yeah, definitely common. Most of the time they attack through cage bars. They bite off fingers. It happens more often with people they don't know very well and people who aren't familiar with chimpanzees. But it has happened to many of the best scientists and researchers, who are now missing digits. The reason we have them behind bars in zoos and research settings is because chimpanzees can be very dangerous—it's to protect ourselves. This was a sort of free-ranging chimp, which is much more dangerous.
But chimps in the wild are not used to people—they're afraid of them. That's why Jane Goodall had to habituate them. So, really wild chimps don't attack people. But in captivity, they have learned in the meantime that they are stronger than humans.
How strong are they? The chimpanzee has strength for a human that is utterly incomprehensible. People watch pro wrestlers on TV and think they are strong. But a pro wrestler would not be able to hold a chimpanzee still if they wanted to. Chimpanzee males have been measured as having five times the arm strength as a human male. Even a young chimpanzee of four or five years, you could not hold it still if you wanted to. Pound-for-pound, their muscles are much stronger. And the adult males, like Travis—unless his were filed down—have big canine teeth. So you have a very dangerous creature in front of you that is impossible to control.
Do chimps in captivity show more aggressive behavior than those in the wild? In the wild they're pretty aggressive. They have warfare among groups, where males kill other males, and they have been known to commit infanticide. Aggression is a common part of the chimpanzee behavior, whether it's between or within groups.
They can show tremendous mutilation. They go for the face; they go for the hands and feet; they go for the testicles. To outsiders, they have very nasty behaviors.
Are male chimpanzees more aggressive than females? Yes, that's for sure.
What might cause a chimp to attack someone it knows? They're very complex creatures. People must not assume that with someone they already know there's not some underlying tension. It's often impossible to figure out what reason they have for attacking.
Having a chimp in your home is like having a tiger in your home. It's not really very different. They are both very dangerous.
Do you think Lyme disease or the Xanax might have been a factor in the attack? It's all possible. It's possible it was the Xanax. In general, in chimpanzees—because they are so genetically close to us—they will react very similarly to drugs. It might be that the dosages are different, but it really should be pretty much the same.
A chimp in your home is like a time bomb. It may go off for a reason that we may never understand. I don't know any chimp relationship that has been harmonious. Usually these animals end up in a cage. They cannot be controlled.
When a chimp is young, they're very cute and affectionate and funny and playful. There's a lot of appeal. But that's like a tiger cub—they're also a lot of fun to have.
What happens when people decide they can't live with a chimpanzee pet any longer? There are chimpanzee sanctuaries. If you want to put a chimp in a sanctuary, I would think you would have to come with a lot of money—it's pretty much for lifelong maintenance. A chimp can live for about 50 years, and 10 is usually the age when people don't want them any more. So that's 40 years of care.
I don't know where people would find these animals or why you would want to have them. Even if a chimp were not dangerous, you have to wonder if the chimp is happy in a human household environment.
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