Get an early start on a ranger-lead hike through Mount Burdell Preserve, and catch morning birdsong. Bird activity should be at its peak; some species will be working overtime to satisfy their ravenous broods, some will be tending newly fledged young, and a few will even be tending new nests. Remember to bring binoculars, if you have them. This walk is for ages 15 and up. Call (415) 893-9527 after 8am on the morning of the event to hear a recorded message if cancelled. Questions: Contact Shannon Burke at (415) 893-9520.