When marmots call

A sound pierced the cloud when I was on Pikes Peak this summer. I thought it was a bird but wondered if it was one of the yellow-bellied marmots that live at those heights. This yellow-bellied marmot site is terrific in giving out that sound - click on the various call names to hear the marmot's vocal range.
On the way up and down the Peak I passed bristlecone pines, old twists of trees that as a species are the oldest living beings on the planet. The Pikes Peak versions are relative striplings at two thousand years old. Here's a great bristlecone website.