CHICAGO — Two rare birds, a major music festival and an overflowing Lake Michigan all claimed a beach on Chicago’s North Side. But there was not enough sand to go around.

The lake, which rose to levels not seen in decades, formed lagoons where sunbathers once lounged.

The festival, which would have featured disco yoga sessions and musicians across three stages, was canceled.

And the birds, one of only about 75 mating pairs of the endangered piping plover left in the Great Lakes region, lost their nest in the rising water.

With help from more than 180 volunteers who kept curious humans and errant volleyballs at a distance, the tiny, photogenic plovers recently built a new nest further inland, away from the swollen waters, and mated again. Three chicks hatched. Two survived.