On many lakes the biggest walleye are taken through the ice.
Sunken islands & humps concentrate winter walleyes.
A portable sonar is essential to good winter ice-fishing.
Tip your jigging spoons with the head or tail of a minnow.
For passive fish switch to small minnows and fish w/tipup.
Lake trout will hit live suckers or frozen ciscos.
Late ice perch will be near spring spawning grounds.
Perch will spread over flats near a spawning bar.
Try to catch smaller perch first...then go for deeper ones.
When water warms walleye start moving to spawning grounds.
Male walleyes becoming aggressive - females still hitting.
Walleyes will take live minnows jigged thru the ice.
Northerns will take large minnows or spoons jigged thru ice.
Wisconsin Outdoor, Winter Ice Fishing Tips