State parks across Michigan are holding programs this week to mark the 40th anniversary of the approval of the state's Endangered Species Act.
The Michigan Department of Natural Resources says the events run Monday through Sunday at sites from Algonac State Park near Marine City to Young State Park near Boyne City.
The event is called Threatened and Endangered Species Week, and the department says that 39 state parks and other sites have programs scheduled.
Then-Gov. William Milliken signed Michigan's Endangered Species Act on July 11, 1974.
The Department of Natural Resources says the law has helped aid the recovery of the bald eagle, gray wolf and peregrine falcon.