The Snake River Aubudon Society and the Zoo discuss why birds migrate and its importance. There are bird-related crafts and activities. Activities are free with paid zoo admission. Zoo admission is $7.50 for adults, $6 for seniors, $4.50 for children 4-12 and free for attendees under 3. Visit birdday.org or idahofallszoo.org; call 208-612-8552.