Tourist Tourism, Yellowstone National Park File

YELLOWSTONE NATIONAL PARK — Doug Smith has been spending a lot of time thinking about tweety birds lately.

The Yellowstone scientist best known for his work on wolves is now leading a study of jays, warblers and sparrows, among other bird species. His researchers wake up obscenely early, leave the office by 3:30 a.m., and are in the woods listening for bird calls before the sun comes up.

The goal is to figure out what migratory and resident birds are living in old growth, subalpine forests consisting of spruce and fir trees — a forest type climate change could erase.

via What will we lose? Tracking climate change in Yellowstone | Environment | bozemandailychronicle.com