Your Tour Guides

Sarah Warner

Sarah works in the Madison WI Ecological Services Field Office for the US Fish and Wildlife service and is involved with multiple projects across the Midwest that focus on endangered species recovery, habitat management, and environmental contaminants. The primary species that Sarah works on are Kirtland’s warbler, poweshiek skipperling, monarch, rusty-patched bumble bee, and the whooping crane. For Kirtland’s conservation, Sarah leads the adult and nestling color banding activities. Previous jobs include research on species such as spotted owls in Olympic National Park, loggerhead shrikes on San Clemente Island, waterbirds in Michigan’s wetlands, and a six month search for the elusive ivory-billed woodpecker in Arkansas. When she is not working, Sarah enjoys birding, bumble beeing, botanizing, photography, and hiking and spending time in Wisconsin’s nature.

Matt Herzmann

Matt Herzmann

Matt picked up a passion for bird watching shortly after he and his wife moved to the Horicon Marsh area in 2009. He participates in the informal Wisconsin Big Green Big Year (BIGBY) competition and has a BIGBY life list of 215 species. This is his 5th year of leading or co-leading the Birding by Bicycle event for the Horicon Marsh Bird festival. He is a board member of the Horicon Marsh Bird Club and the Dodge County Coordinator of the Wisconsin Breeding Bird Atlas.

Peter Fissel

Peter is one of the moderators of Wisbirdn a list-serve for Wisconsin birding. He is also a longtime field trip leader for Madison Audubon.

Tim Hahn

Tim is the Vice President of the Benjamin E. Goss bird club. Mr Hahn also is the breeding Bird Atlas coordinator for Waukesha and Marinette counties

Dr Sheldon Cooper

Dr.Sheldon Cooper is a professor in the Department of Biology at the University of Wisconsin Oshkosh, where he has worked since 2001. His primary research interests are in thermoregulation and ecological energetics of birds, particularly chickadees and titmice. Cooper served as the Wisconsin Society for Ornithology Research Chair from 2006-2009 and has done numerous bird-related presentations at elementary Schools in the Oshkosh area.

Jon Krapfl

USFWS biologist working at Horicon NWR. Where he assists in the conservation, protection, restoration, and enhancement of wildlife and rare/endangered plant habitats through planning and by collecting the data to carry out studies or investigations.

Dick Nikolai

Dick is a retired wildlife biologist and master bird bander who has been conducting ongoing research since 1985 on purple martins in Wisconsin. He is one of the founding members of the Bluebird Restoration of Wisconsin (BRAW) and a Board Member of the Wisconsin Purple Martin Association

Jerry Genzmer

Born and raised in Horicon. The marsh was a big part of Jerry’s childhood which made him a natural when he joined Horicon Marsh Boat Tours as a guide in 1986. He began his interest in birding at a young age when his parents got him his first bird book and feeder

Renee Wahlen

Renee is the director at Marsh Haven Nature Center and is responsible for programming, educational opportunities, and management of the facility. With a degree in ecopsychology, she is interested in helping people find their personal connection with nature.

Joel Trick

Joel worked as a Biologist for USFWS for 27 years (retired) all of it in Wisconsin. He worked with Whooping Cranes, Piping Plovers and Kirtlands warbler. Joel is now on the Board of Directors of the Western Great Lakes Bird and Bat Observatory.

Greg Seegert

Greg birds extensively and typically sees 550-600 birds in the ABA area each year, Greg has an ABA life list of over 700 birds in North America. He grew up in Beaver Dam, owns a farm in the area, and has birded for many years throughout Horicon Marsh and the surrounding area. He enjoys working with and mentoring birders of all levels.

Daryl Tessen

Member of Wisconsin Society of Ornithology for over 50 years where he was past president.
24 years Western Great Lakes regional editor for North American Birds. Author of the book “Wisconsin Favorite Bird Haunts”. Co-Author of the field guide “Birds of Minnesota and Wisconsin” . Daryl has a Wisconsin life list over 400 species of birds.

Jeff Bahls

Jeff put out his first bird house when he was about 7 years old. He has 40 years experience with the Horicon Marsh where he works part time for the Wisconsin Dept of Natural Resources. Jeff has been a member of Horicon Marsh Bird club for the past 22 years and is the current President. He currently sits on the board of the Wood Duck Society, a nationwide organization devoted to placement, and care of Wood Duck nest boxes and the life cycle of the Wood Duck. Jeff was a member of Cornell Lab of Ornithology 2007 search team, for Ivory Billed Woodpecker in Arkansas. In 2018 Jeff was awarded the Wisconsin Society of Ornithology bronze Passenger Pigeon award for outstanding contributions in local and state areas for study and enjoyment of birds. Jeff also enjoys looking for birds in his kayak along Wisconsins wonderful wetlands.

Holly Bartholmai

Holly became interested in birding when she and Jack moved to 22 acres of varied habitat in rural Beaver Dam – a place they call Hickory Springs – and began feeding the birds in their yard. She attended many of Bill Volkert’s bird programs on the Horicon Marsh and took a 6-week birding class at Riveredge Nature Center with Andy Larson. She has assisted Jack in monitoring their nest box trails and doing frog, Woodcock, Breeding Bird atlas, and Great Backyard Birdcount surveys. They are avid backyard birders with a list of 182 species of birds that have visited their Hickory Springs home over the years. As a longtime member of the Horicon Marsh Bird Club, Holly writes monthly program articles and has served as treasurer and the Horicon Marsh Bird Festival planning committee.

Jack Bartholmai

Jack’s passion is photographing wildlife in and around Dodge County with special interest in the birds. Jack spent more than a decade doing frog and Woodcock surveys for the Horicon National Wildlife Refuge. This gave him the opportunity to be in the marsh after dark and become familiar with not only the sounds of the frogs and toads calling there, but also the birds that call from dusk into dark. He has monitored nest box trails in Dodge County since the mid 80’s. He and his wife, Holly, took part in the Wisconsin Breeding Bird Atlas I survey and are doing priority block surveying for the WBBA II. Jack was program chair of the Horicon Marsh Bird Club for 20 years. Jack is a member of WSO and recipient of their Bronze Passenger Pigeon in 2005.

Marty Evanson

Marty has been interested in bird watching since the early 1980s. He has participated in various bird surveys throughout Wisconsin since the early 1990’s such as the Christmas bird counts and breeding bird surveys. He participated in the Wisconsin bird atlas project. Marty is the Atlas coordinator for Adams county. He has led numerous bird hikes for youth groups, co-lead bird walks for the Friends of the Nature Lakeshore Preserve (Picnic Point) and led bird trips for the Madison Audubon Society. Marty, being a very active birder, has accumulated a Wisconsin life list of over 315 bird species.

Liz Herzmann

Liz Herzmann is a Wildlife Educator for the Department of Natural Resources at the Horicon Marsh Education and Visitor Center. She is responsible for the educational programming and special events held at the Education Center. These programs allow people of all ages to experience the wildlife and natural resources of Horicon Marsh. Previous to working at the Education Center, Liz worked for Northern Illinois University teaching outdoor education at a field campus to 4th-8th grade students.

Erin Railsback

Erin works for the U.S. Fish and Wildlife Service as a Visitor Services Specialist at Horicon National Wildlife Refuge. She is responsible for the environmental education, interpretive, and volunteer programs at the refuge – programs that provide opportunities for numerous youth, visitors, and volunteers to learn about and connect with the Horicon Marsh.

Brad Webb

Brad is a founding member and tour leader of a group scheduling bird walks in Dodge and Jefferson Counties. Brad enjoys introducing new members to the pleasures of birding and sharing birding moments with experienced birders as well. A longtime member of the Horicon Marsh Bird Club and current VP, he is often found somewhere on the marsh checking out residents and migrants alike.

Marc Zuelsdorf

Marc’s family has owned and operated Horicon Marsh Boat Tours since 1994. Marc, who purchased the business from his father, Roland, (founder of the business in 1963) has been guiding tours since the age of eleven. Marc enjoys leading and educating visitors through the marsh in an effort to preserve the natural state of Horicon Marsh. In March of 2007 the business received a Travel Green certification from the WI Deptartment of Tourism and WI Environmental Initiative for their effort in environmentally sustainable business practices.