Why did the orangutan（猩猩）cross the road? That's not the start of a joke, but a question being asked by scientists studying these brilliant apes.
Brent Loken, who runs a group called Integrated Conservation, used camera traps to research into orangutans. That group protects 1 animals in Borneo, the largest island in Asia. Camera traps work by taking a quick photo, when something moves in front of them. In Borneo, scientists use the photos to 2 what the rare orangutans do when people aren't 3?
Scientists have been studying orangutans in the rainforests for decades. And their data had suggested that the animals almost always traveled through the 4. They were 5seen walking on the forest floor. Yet when Loken looked at the photos from his team's camera traps, he got surprised that the apes were walking on the ground, 6 using logging roads（运材道路）and paths built by people.
Were these animals simply 7to walk on the ground because logging had left too many 8? Or did they 9 down logging roads as convenient shortcut? “More10 is needed,”
People are removing trees for logging, plantations and the building of the cities. The new findings suggest orangutans might be able to learn to 11with some of these changes in their 12. It doesn't mean the animals can survive 13 forests. But it does suggest there might be ways to log forests in a way that won't greatly14 these apes.
Stephanie Spehar, primatologist at the University of Wisconsin, Oshkosh, agrees. “The new study doesn't mean they're fine in areas with no trees,” she says. “Orangutans clearly need the forest to 15.
