Hikes under a full moon, birding, spotting bison: A weekend mix at parks

Here is a list of some of the activities and their locations:

• Hike, 6-7 p.m. Friday, Sibley State Park. Hear stories about the stars. (1-320-354-2055, mndnr.gov)

• Walk, 6:30-8:30 p.m., Friday, Eastman Nature Center. The sights, sounds and scents of nature at night. (763-694-7700, threeriversparks.org)

• Walk, 6:30-8 p.m., Friday, Lowry Nature Center (763-694-7650)

• Geocaching, 6:30-8:30 p.m., Saturday, Silverwood Park. In search of s'mores. Call 763-559-6700 to make a reservation.

• Walk, 6:30-8 p.m. Saturday, Richardson Nature Center. Head out with naturalist. (763-694-7676)

Track tundra swans

In November, thousands of migrating tundra swans stop at the Upper Mississippi National Wildlife and Fish Refuge on their way to Chesapeake Bay. Join a naturalist for a short presentation at the visitor center. Then, caravan through the Whitewater Wildlife Management Area to Weaver Bottoms on the Mississippi River to observe tundra swans. Binoculars, spotting scopes and handouts are available. (1-507-312-2308, mndnr.gov)

Minneopa State Park, 10:30-11:30 a.m. Saturday

Celebrate National Bison Day and hear a talk about North America's largest mammal. Minneopa State Park currently has 15 bison as part of the Minnesota Bison Conservation Herd, an effort to help preserve the genetics of the American Plains bison. Meet at the group campground, just off Hwy. 68. (1-507-384-8890, mndnr.gov)

Minnesota Valley National Wildlife Refuge, Bloomington, 9 a.m.–1 p.m. Saturday

What the birds are telling us about our surroundings? The program splits between the classroom and outdoors. (952-854-5900, mntracking.org)

Water/Ways is part of the Smithsonian's Think Water Initiative to raise awareness of water as a critical resource through exhibitions, educational resources and public programs. The local piece of this national exhibit, titled We Are Water MN will be on display at the park through December.

Fort Snelling State Park, 1-2 p.m. Sunday