

Dennis was a 1960 graduate of Hammond High School and attended Valparaiso University,
1960-61. In 1965, he earned his B.S. degree from Purdue University’s Wildlife Biology program.
At Purdue, Dennis met his loyal and loving wife, Estelle (Beihl) McGroarty whom he married on
August 27, 1967. From 1965-1967 he served as wildlife area manager of the Kingsbury and
Adderbury State Game Areas in Northern Indiana. From 1965-1971, Dennis was a member of
the Indiana National Guard, and in 1971 he earned his M.S. in Entomology at Purdue University.
In 1972, Dennis and Estelle moved to East Lansing, Michigan, eventually settling down in Holt,
Michigan where they raised their two children, Michael (Michelle) McGroarty and Kathleen (Ines)
McGroarty-Torres. Completing his formal education, Dennis earned his PhD in Entomology from
Michigan State University in 1977.
Dennis was an amazing man. The stories he told were mesmerizing…and usually hilarious.
Despite his occasional gruffness, people loved talking with Dennis because he was interesting,
and because he had a way of making them believe they were interesting too. People felt special
and important when they were with Dennis. His sincerity, calming presence, and genuine
engagement were as legendary as his sense of humor. He loved to make kids laugh.
Dennis spent his life teaching people of all ages about biology, conservation, and the beauty of
the natural world. He was an adjunct professor of biology at Lansing Community College from
1975-2014 and served as a lecturer at Michigan State University in the late 1980s and early
1990s. Dennis was proud of being on the cutting edge of modern education, teaching some of
the first virtual courses at LCC. He also challenged students with field trips that provided
hands-on experiences in destinations as close as the local bog or as far off as the rain forests of
Costa Rica. Dennis was always excited to point out the specific insects, plants, and wildlife that
helped define the ecological niche. He shared his knowledge with countless children throughout
the Lansing area. This included catching critters in rivers and streams with the Cub Scouts,
saving neighborhood homes from unwanted bats and rodents, sharing his collection of animal
skins and skulls, and doing insect dissections in his grandchildren’s classrooms.
Dennis was an avid outdoorsman who was most happy in a fishing boat or a goose blind. He
was a capable fly-tyer, taxidermist, waterfowl carver, beekeeper, gardener, and collector of
critters, enjoying his hobbies with his children and grandchildren. He and Estelle traveled the
world and enjoyed the ecology of places like Belize, the Galapagos Islands, Spain, Ireland,
Mexico, and many places in the U.S. But his favorite destination was always his cottage on
Loon Lake with his family and friends.
Dennis leaves behind his wife of 54 years, Estelle, his son Michael and daughter Kathleen, his
grandchildren Avery McGroarty, Joseph McGroarty, Kaitlyn McGroarty, Estevan Torres, Diego
Torres, and Clara Paz Torres. Daughter-in-law Michelle McGroarty and son-in-law Ines Torres
also held very special places in his heart. He leaves behind many loving cousins, nieces,
nephews and friends with whom he was always ready to share a drink and a story.
Dennis taught all his family members what it means to show unconditional love and support. He was
incredibly proud of his wife, children, and grandchildren and always showed up to cheer them
on. Over the years, he attended countless swimming and gymnastics meets, soccer games,
band concerts, theatrical productions, and dance recitals. And he was always ready with big
hugs and words of wisdom when the curtains closed and the scores were tallied. He would
remind us to “go with the flow” and not to “sweat the small shit.” His words resonate with us still,
and we hope to continue making him proud.
Dennis served several terms as a deacon and elder at Holt Presbyterian Church and
Eastminster Presbyterian Church. A memorial service will be held for Dennis in the springtime at
Eastminster Presbyterian Church in East Lansing. In lieu of flowers, take a kid fishing or on a
walk through the woods; contributions can be made to Eastminster Presbyterian Church.
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