MARSHFIELD — The city of Marshfield Parks and Recreation Department regrets to announce the death of its beloved gray wolf, Nelson. Nelson passed away on May 18 due to age-related health complications. He was 14 years old at the time of his death.

Nelson came to Wildwood Zoo in June of 2010 from the Wildlife Science Center in Minnesota on a lifetime animal loan. He quickly became a zoo favorite and inspired admiration and respect for his species in visitors both young and old.

Nelson was born on April 22 (Earth Day), 2001, and was named after the founder of Earth Day, Gaylord Nelson, a former U.S. Senator. The first Earth Day led to the creation of the United States Environmental Protection Agency and the passage of the Clean Air, Clean Water, and Endangered Species Acts. Today Earth Day is celebrated by over 1 billion people in 196 countries around the world. One of the goals of the Earth Day Network is to inspire “A Billion Acts of Green.”

In honor of Nelson, Wildwood Zoo asks you to consider your own “act of green.” It could be as simple as biking to work or school, planting a tree, picking up litter around your house or favorite park, or using reusable bags at the grocery store.

Zoo staff intends to acquire new wolves for the exhibit after some minor improvements and modifications to the exhibit are completed.