Online MembershipsOnline memberships are now available! You can also pay for your membership in person at the Owl's Nest Gift Shop. Supporting Memberships Life Membership - $1000 Bison Membership - $500 Bald Eagle Membership - $250 Pronghorn Membership - $100 Family Memberships Family - $40 Family of Educator - $25 Family of Senior (62+) - $25 Individual Memberships Individual - $25 Educator/Student - $15 Senior (62+) - $15