Laney Griffo | Special to The Union On the second Friday of the year, from 9 a.m. to noon, volunteers spread out to 26 locations around Lake Tahoe to look for birds. Laney Griffo The crisp air chills the group of bird watchers as they sit on the pier at Zephyr Cove, on Lake Tahoe’s South Shore, waiting for bald eagles to show themselves. One of the bird watchers comes from Sacramento every year to sit on the same pier to count bald eagles with the Tahoe Institute of Natural Science. Since the 1980s, groups have gone out once a year to count the number of bald eagles they see within a three-hour time period.