Medford Leas Birders - The group, led by residents Dave and Miriam Swartz,. holds monthly meetings, organizes field trips, and a provides a yearly January census of birds found on the two campuses.

Birds and bird identification has been of interest to residents of Medford Leas since at least 1973 when articles called "Bird Watchers Notes," began appearing in Medford Leas Life. In 1991 a pamphlet was published listing birds seen at Medford Leas arranged by season and frequency of appearance. It was revised in 2002 and is kept up-to-date.

In 2013 a rich body of information from the Birders' archives will be installed on a blog at medfordleasbirders.blogspot.com

Courtyard Mapping - Betsy Pennink, a resident volunteer, has prepared a labeled diagram, to scale, for the Atrium Garden and each Courtyard Garden. When the plantings in a garden change, the diagram is updated. When complete, the Geographic Information System for the Courts will include diagrams and photos for each court.

The Farm -There are community gardens on both campuses, organized and operated by residents with support from the landscaping department. A photo essay "Down on the Farm" illustrates 2011 spring planting and fall harvest on the Medford Campus. 2013 farm news: "A large abandoned bed was divided in two and planted with buckwheat, a nice cover crop that keeps the weeds down and attracts bees. The late Charlie Shearer's strawberry and raspberry beds have been revived. More raised beds are "sprouting up." Two groundhogs have been caught and relocated and two wild turkeys like to wander through the Farm . There is now a 'Freecycle' area set up where folks can leave unneeded gardening items and anyone can take what they might need.

Geographic Information System - the GIS project is now done entirely by resident volunteers led by Dave Bartram whose Arboretum Documents Page includes a 2012 paper for the Arboretum Oversight Committee that provides insight into the direction the project is taking.

Master Gardeners - Burlington County Master Gardeners meet Mondays at the Nature Center where they respond questions to their help line. They also have a large plot in "The Farm" raising vegetables which they give to food banks. In 2007 a10-minute video titled "Master Gardeners at Medford Leas" was prepared by a Medford Leas resident. The video, taken in the Nature Center, shows of an interview with the Burlington County employee who coordinates the program and two other Master Gardeners.

Lumberton Trails and Site - There are about a dozen residents who provide labor and expertise toward the maintainanceof the Lumberton property. They maintain the trails and bridges for walking and the stream for paddling. They repair fencing and fight invasives -- including mugwort, bittersweet, Ailanthus, catbrier, poison ivy, and just plain weeds. Without the support and perseverence of these volunteers there would be no trail system and forever mugwort in the meadow.

Nature Bulletin Board - Resident Steve Denham has different styles and various topics for his Bulletin Board displays. The Medford Leas Life article "Bats Bees and Butterflies" describes one type of display whereas the photo essays "An Afternoon Slosh Along Kreibel Way" and "Heros of the Trails" are electronic versions of totally different displays -- ones that tell stories using photos taken by Denham.

Nature Library - Joy Moll, head librarian, and her assistant, Virginia Mattice, both former librarians, are devoted to managing and maintaining the library. From time to time other former librarians have been recruited to take handle special projects. The primary source of the library's books, videos, and pamphlets is donations from residents. Just recenty, in the spring of 2013, The library received a collection of 70 books, many in areas, such as birding and guidebooks, where the current collection needed strengthening.

Nature Walks - In 2002 former wildflower walk leader Rudy Salati developed a database of Medford Leas wildflowers. Using Rudy's database, Maggie Heineman built the MLRA wildflower website. In 2013 Rudy's successor Jane Bourquin, an expert amateur naturalist, retired as walk leader and Maggie began using the Arboretum Blog to keep records so that residents without Jane's expertise can know when and where to find wildflowers in bloom.

Woodland/Trails - Maintaince of the trails requires year-round commitment. The work is described and explained in two MLRA photo essays: "Heroes of the Trails" uses Steve Denham's humor and photographs to applaud the work of this group. John Caughey's article provides further explanation of the work of the group, which is now led by Carol Neil.. Although personnel has changed, the work done and the procedures used continue. Gordon Clift, resident and Trail Hero, is shown at work.