May 7 PBS airs "Fire Wars", a two-hour Nova special that follows the California-based Arrowhead Hotshots as they drop in on the Clear Creek fire, a northeastern Idaho blaze that burned for two months in the summer of 2000. www.pbs.org/nova

May 11-18 Sure, there are 80 kazillion pigeons out there. But what about magnificent frigate birds? Or whippoorwills? This week, in the Audubon Society's 2002 Birdathon, ornithologists (like you) seek them out in a nationwide avian scavenger hunt. www.audubon.org

May 19-22 The World Ecotourism Summit comes to Quebec City, Quebec, Canada. 418-692-1699; www.bonjourquebec.com/ecotourisme

May 24-27 The Mountainfilm festival hits Telluride, Colorado, over Memorial Day weekend. This year's fest includes a "Mountains of Islam" symposium, offering films and speakers from the nations of Central Asia. 970-728-4123; www.mountainfilm.org

May 29 Having already completed an unsupported trek across Antarctica to the South Pole, on this date Swedes Thomas and Tina Sjogren hope to arrive at 90 degrees north as part of the Poles Wearables Expedition. They will have left Canada's Ward Hunt Island in March, and if successful, they'll be the first to trek to both poles back-to-back. www.thepoles.com

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