This polygon layer consists of home range core areas surrounding each
territorial California spotted owl activity center detected after 1986.
Home range core area sizes are as follows: 2,400 acres on the Hat Creek
and Eagle Lake Ranger Districts of the Lassen National Forest, 1,000
acres on the Modoc, Inyo, Humboldt-Toiyabe, Plumas, Tahoe, Eldorado,
Lake Tahoe Basin Management Unit and Stanislaus National Forests and on
the Almanor Ranger District of Lassen National Forest, and 600 acres of
the Sequoia and Sierra National Forests.