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Welcome to The Thielke Arboretum, Glen Rock, New Jersey!

The Garden in Your Backyard

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Weed Warrior Day 2017
Spring StoryWalk 2017
Winter Journey Sticks Wal
Bark ID Workshop
Winter StoryWalk
Nature Journaling 2016
Fishing Derby - 2016
Bird Watching
Summer StoryWalk
Fall StoryWalk
Country Music Benefit Con


Len Greer


Don’t you love hearing the sounds of the birds and seeing so many of them in the spring?  To further your enjoyment of this lovely season, the Thielke Arboretum, 460 Doremus Ave., Glen Rock, is offering a guided bird walk on Sunday, May 15, 2016, beginning at 8:00 AM.  Len Greer, a local resident and experienced birder and photographer, will lead this walk through the beautiful Arboretum, an ideal spot for birding because of its location in the path of the Atlantic Flyway, a migratory path for birds. 


Len is a “raptor enthusiast”, having photographed many hawks, falcons, and other birds at the Arboretum.  His position at Johnson& Johnson’s Health and Wellness division further enhances his understanding of the many health benefits of being immersed in nature, which he is so enthusiastic about sharing with others.  On this walk, he will offer not only bird identifications, but also wildlife photography tips and will share his favorite locations for spotting interesting birds. 


This guided tour will last approximately ninety minutes.  All you need to bring with you (dress for the weather) are binoculars, your camera or iPhone, patience, and a desire to learn more about our feathered friends that are so important to our environment. This tour is by donation, payable at the time of the walk.  In addition, a beautiful illustrated Arboretum bird guide will be also available for purchase for a small donation. 


The Birding Tour at the Thielke Arboretum is one of several interesting educational events planned for the 2016 outdoor season.  The Arboretum is a 501 (c) 3 non-profit organization dedicated to the preservation of our natural habitats through the efforts of its volunteers.