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This is Scientific American's 60-second science. I'm Christopher in Taliatta.

Up in California's high Sierra, above the dense pine forests, rocky habitats rain.

And if you look carefully among the boulders, you might see a pica, a rabbit relative the size of a hamster, with round ears and big eyes.

Hikers oftentimes see them with little bouquets of wildflowers sticking out of their mouth

as they run back to their homes to cash them in hay piles.

Joseph Stewart, a conservation biologist at the University of California, Santa Cruz.

Maybe I'm a little biased. Other people tell me they're very cute, and I would agree.

I find them majestic.

I feel like they're, you know, the lords of the mountains.

Stewart is also a skilled spotter of PICA's.

You could say I've got a little bit of experience with that.

Which makes it all the more strange that in five years of surveys, of 64 square miles of high mountain rocky habitats

near Lake Tahoe, he found no pikes at all, in an area littered with decades-old pika

droppings. It's relatively pristine habitat in the center, rather than the edge of historic pika

territory, so Stewart suspects the most likely culprit for this local extinction is rising temperatures due to climate change,

and the mercury is heading higher.

By 2050, we expect there's going to be a 97% decline in the area of climatically suitable habitat for the species in the greater Taho area.

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