Largemouth and smallmouth bass continue to defend their nests until their offspring are about an inch long and leave the nest in a large school. When the water temperature reaches about 70, male bluegills build their nests in large colonies. The black bullhead spawns in early summer in a nest dug by the female, who then cares for her young until they're about two inches long. The Johnny Darter, a small member of the perch family, spawns on the underside of rocks while swimming upside down. Better yet, wait until the first hard frost next fall.
Open wounds increase the chances of a picnic beetle carrying the fatal oak wilt fungus to the tree.
Oak wilt has been present in Wisconsin since the late 1800s. All oaks that are native to Wisconsin can be infected. Red, black and northern pin oak are the most susceptible. Once oak wilt is in these trees it's almost always fatal. White and bur oaks sometimes survive an infection.