Join W. K. Kellogg Bird Sanctuary staff and fellow bird enthusiasts from 9 to 10:30 a.m. Saturday, Dec. 2, to practice identification skills by sight and sound on a walk through the Sanctuary.   Participants in the guided walk will meet at the Resource Center building, then walk down to Wintergreen Lake to look for autumn birds.   The cost of attendance for Sanctuary members is $6 for adults, $5 for seniors and students, and $4 for children ages 2-17. For non-members, admission is $8 for adults, $7 for seniors and students, and $6 for children ages 2-17. Though the program is geared toward adults, avid junior birders are also welcome. This event has a minimum enrollment of four and a maximum of 20, and registration is required. Visitors are encouraged to bring their own binoculars.   The W.K. Kellogg Bird Sanctuary is located at 12685 East C Ave., one mile north of M-89 and just west of 40th Street. To learn more, visit birdsanctuary.kbs.msu.edu. Direct questions to birdsanctuary@kbs.msu.edu or (269) 671-2510.   Please consider supporting the Sanctuary by becoming a member.