Ili Pika

You could call it one of the world's longest games of hide and seek. For more than 20 years, the Ili pika (Ochotona iliensis), a type of tiny, mountain-dwelling mammal with a teddy bear face, had eluded scientists in the Tianshan Mountains (map) of northwestern China. People have seen the furry critter only a handful of times since it was discovered by accident in 1983. In fact, people have spotted only 29 live individuals, and little is known about the animal's ecology and behavior. (Also see "Newly Discovered Carnivore Looks Like Teddy Bear.") Then, in summer 2014, researchers rediscovered the pika. Weidong Li, the species' original discoverer and a scientist at the Xinjiang Institute for Ecology and Geography, had gathered a group of volunteers in the Tianshan Mountains for some pika searching. At noon one day, as they were setting up camera traps, the team spotted their prize. "They found it hiding behind a rock, and they realized they had found the pika. They were very excited," said Tatsuya Shin, a naturalist in China who works with the pika's discoverers. In 1983, the Chinese government sent Li to the mountainous Xinjiang Province to study natural resources and infectious diseases. As Li explored a valley by Jilimalale Mountain, he saw a small, gray head sticking out from a crack in the rock. As he edged closer, Li got a look at its whole body. The animal was about 8 inches (20 centimeters) long, with large ears and several small brown spots in its gray fur. Li wasn't familiar with the species, nor were nearby herdsmen. Li caught a specimen and sent it to a scientist at the Chinese Academy of Sciences, who said he believed the pika was a new species. Although Li couldn't find any more pikas on a second trip to the area in December 1983, a third trip in 1985 was more successful, and the additional specimens allowed academy researchers to confirm that the Ili pika was new to science.