Officials say the eagle was discovered Sunday afternoon in Mequon, less than 20 feet from its nest on the Lake Michigan shore.
Department of Natural Resources regional ecologist Owen Boyle says the bird was found on land belonging to the Ozaukee Washington Land Trust with no signs of a gunshot or trauma.
He says the eagle will be taken to a Madison laboratory to determine what killed it.
Boyle says neighbors reported seeing the eagles flying together late last week. He says it's not known yet whether the male or female died.
The pair produced a single eaglet last year and this year.

