Photo gallery Ducking into spring

1 A female, left, and male mallard take a swim as Lake Mendota continues to thaw and patches of open water form near the shore. Photo by: Jeff Miller

2 Most species of ducks find a different mate each year, with many waterfowl often forming bonds between the months of December and March on the wintering grounds or during the spring migration. Photo by: Jeff Miller

3 The median date of the ice fully opening up on Lake Mendota is April 4. Photo by: Jeff Miller

4 A male mallard takes flight above Lake Mendota. Photo by: Jeff Miller

5 You can swim — I'll walk there. Photo by: Jeff Miller

6 A territorial chase ensues between two breeding male mallards. Photo by: Jeff Miller