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May 2019
May 2019

May 4, 2019

Taconic Crest Trail in One Year (May 4, 2019 9:00 am - 10:00 am)

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Petersbrug Pass to Snow Hole and on to north end in North Petersburgh, 7.9 miles.

Leader: Michael Jensen

The Snow Hole, a deep crevice where snow and ice last well into the summer, is the highlight of this section. Also long views to the west and to the east into Vermont, white quartz, and a short stretch in Vermont, finishing with a long, steep descent to the north trailhead along Route 346. 

We will hike the entire 37 miles of the Taconic Crest Trail over the course of the year in six separate trips. This beautiful ridge-top trail winds through New York, Massachusetts, and a corner of Vermont, from North Petersburg to near New Lebanon, passing by the renowned Snow Hole and over Rensselaer County’s highest peak. With about 7000 feet of both cumulative ascent and cumulative descent, views include the Little Hoosick Valley and Mount Greylock. Join us for one, some or all of the sections. Those who complete the entire trail (with us and/or on their own), can receive a patch from the Taconic Hiking Club.

All hikes have long steep uphill and/or downhill sections over rocky ground. Wear boots or sturdy shoes. Bring lunch, snacks and plenty of water. Prepare for cool and windy conditions. 

All hikes start at 9 am. Free for members, $5 for non-members. Please register here.

May 11, 2019

Birds and Bird Song at Staalesen Preserve, Troy (May 11, 2019 7:30 am - 9:00 am)

Naturalist Series

Part of our Rensselaer Naturalist Series! Although within the city limits of Troy, RLT's Staalesen Preserve has a wonderful diversity of birds. We will look and listen for spring migrating and local resident birds in field, edge, shrub, streamside and marsh habitats.  Suitable for birders of all levels, including beginners. Bring binoculars.

Meet at the parking lot of the Staalesen Preserve on Wynantskill Way in Troy.

Register in advance HERE

Questions? Contact trip leader Jim de Waal Malefyt at

Suggested donation of $5.

Resources for this outing are listed below and can also be found here along with learning goals.

Birds, Bird Songs, and Birding

Field Guides

Sibley Field Guide to Birds of Eastern North America, 2nd Edition
Sibley's Birding Basics: How to Identify Birds, Using the Clues in Feathers, Habitats, Behaviors, and Sounds
The Crossley ID Guide: Eastern Birds
Peterson Field Guide to Birds of Eastern and Central North America, 6th Edition
National Geographic Field Guide to the Birds of North America, 7th Edition
National Geographic Birding Essentials: All the Tools, Techniques, and Tips You Need to Begin and Become a Better Birder

Apps to help with Identification

Merlin (free; with photo recognition and sound files)
Audubon Bird Guide (free; with lots of free sound files)
Raptor ID (paid)
Warbler Guide (paid)
Most of the major field guides also come in app form (paid; see the list of field guides below)

Apps to Learn Sounds

LarkWire (paid)
SongSleuth (paid)

Websites to Study Sounds

Macaulay library

Photo and Song Quizzes

Internet Bird Collection

To find places to birdwatch

Hudson-Mohawk Bird Club: covers Rensselaer County and a good way to get connected for birding in our region

Birding the Hudson Valley, by Kathryn J. Schneider. 2018. University of New England Press.

Invasive Plants Program and Workday with Capital Mohawk PRISM (May 11, 2019 9:00 am - 12:00 pm)

Naturalist Series

Learn how to identify, report, and remove invasive species right here in Troy! The native plants of one the largest open spaces in Troy need our help by cutting bittersweet vines and pulling other invasives. We will be led by Spencer Barrett, Terrestrial Invasive Species Coordinator with Capital-Mohawk PRISM.. Wear old clothes, work gloves, and boots or shoes you don’t mind getting wet. Bring lopper/clippers for cutting vines if you have them.

Meet at the parking lot of the Staalesen Preserve on Wynantskill Way in Troy.

Questions? Contact Joe Durkin at No charge.

Register HERE.


Event can be used as credit toward becoming a Rensselaer Naturalist.

Co-sponsored by Rensselaer Land Trust, Rensselaer Plateau Alliance and Capital-Mohawk PRISM.

Resources for this outing are listed below and can also be found here along with learning goals.


Invasive Species Resources

Identification Guides

Invasive Plants: Guide to Identification and the Impacts and Control of Common North     American Species. 2ndedition. 2013. Kaufman and Kaufman.

Species Profiles at NY Invasives Species Information

Identification Resourcesat iMapInvasives

Identification Guidesat Capital Mohawk PRISM 

Finger Lakes Invasive Species Field Guide


Information about Invasive Species

Capital Mohawk PRISM(Partnership for Regional Invasive Species Management)

Invasive & Nuisance Species(Cornell Cooperative Extension Columbia and Greene Counties)

iMapInvasives New York

New York Invasive Species Research Instituteincluding Best Management Practice Guides

NY Invasives Species Information

Online Guide to Aquatic Invasive Species in Northeastern North America

May 18, 2019

Spring Wildflowers at RPI Tech Park (May 18, 2019 10:00 am - 1:00 pm)

Naturalist Series

Part of our Rensselaer Naturalist Series co-sponsored by Rensselaer Land Trust and Rensselaer Plateau Alliance.


All are welcome.

May is the month for spring wildflowers to bloom, and the woods, fields, and ravines behind the Rensselaer Technology Park provide good habitat. Tom Phillips, local botanist, will help us find and identify the area’s wide variety of spring flowers. We will walk about three to four miles along the Tech Park’s trails, with moderate ascents and descents, and some muddy spots.

Meet at the Rensselaer Tech Park, taking Jordan Rd. off Rt. 4, turn left on Stone Clay Rd. and then quick left into parking area just below Children’s Museum.

Register in advance HERE


Contact Tom Phillips by e-mail. Suggested donation of $5.

Resources for this outing are listed below and can also be found here along with learning goals.



Many entries are from An Annotated Bibliography of Identification and Natural History of New York Native Plants, by Steve Young, New York Natural Heritage Program


Field Guides

Newcomb’s Wildflower Guide. Newcomb, Lawrence. 1977. Little, Brown and Company. 
This is the most useful illustrated field guide for identifying wildflowers in New York. It has a very easy-to-use key which uses flower structure and leaf arrangement. Since plants are arranged by flower structure many similar plants are illustrated together, which facilitates identification. It includes many obscure wildflowers that are usually not illustrated in other field guides. Since it uses illustrations instead of photographs the important identification characters are easier to distinguish.

Peterson’s Field Guide to Wildflowers of Northeastern and North Central North America. Peterson. Roger Tory and Margaret McKenny. 1968. Houghton Mifflin. 
This is probably the second-most useful field guide after Newcomb's Wildflower Guide and they can often be used together. The illustrations are very useful, especially with the small arrows pointing out identification characters. It’s one drawback is arrangement by flower color which is less useful then by flower structure.

Wildflowers in the Field and Forest. A Field Guide to the Northeastern States. Clemants, Steven and Carol Gracie. 2006. 
This is a very useful wildflower guide based on flower color and using photos to show the plants. There is often more than one photo per plant and it is one of the few guides that has distribution maps for the plants. 

Wildflowers of New York in Color. Chapman, William K. et al. 1998.
A photographic field guide of the more common and showy wildflowers encountered in NY. The photographs are beautiful but the descriptions are fairly short with only general habitat information. It is arranged by flower color, flower structure and leaf arrangement.

General Information and Natural History

Wildflowers along the Way. Brown, Margaret and Marguerite Wellborn. 1989. Environmental Clearinghouse of Schenectady, Niskayuna, New York.
This is a small but information-packed booklet about the natural and cultural history of the most common wildflowers in the Capital District, arranged by season. There are very nice line drawings by Clem Habetler.

Trailside Notes. The Naturalist’s Companion to Adirondack Plants. Schottman, Ruth. 1998. The Adirondack Mountain Club.
This book provides an interesting look at the natural history of our most common and conspicuous wildflowers (including many found in Rensselaer County). There is a mix of science, lore, edibility and etymology and humor written in a conversational style. Over half of the book is devoted to our spring ephemerals.

A Guide to Enjoying Wildflowers. Stokes, Donald and Lillian. 1984. Little Brown and Co.
This book tells how to watch many common wildflowers throughout the year, with information on flower structure and pollinators, and on natural history.

The Naturalist's Guide to Field Plants: An Ecology for Eastern North America. 2004.
The Naturalist's Guide to Forest Plants: An Ecology for Eastern North America. 2003. 
Both by Cox, Donald D. Syracuse University Press.
The books in this series contain interesting and useful information on the natural history and ecology of plant communities in our area. In addition to a sampling of the plants and animals each book has a section on naming and collecting plants and activities to do.

Wildflowers of the Northeast. Anna and Spider Barbour. 1991. The Overlook Press.
Beautiful photographs and informative text in this coffee-table book connect scientific facts about the Northeast’s natural history with what a person can witness by going out to the woods or fields or swamps.

Winter Wildflower Field Guides

A Guide to Wildflowers in Winter. Levine, Carol. 1995. Yale University Press. 
This is the best book for identifying wildflowers in the winter. There are very detailed drawings of many species with excellent descriptions. Many graminoids are included and there is even a section with photographs of basal leaves that is very useful.

Weeds in Winter. Brown, Lauren. 1976. W. W. Norton & Co. 
A very useful guide to wildflowers (they are not all weeds) in the winter. There is a detailed key, very nice drawings and useful descriptions and natural history information.

Winter Weed Finder. Finder Field Guides. Nature Study Guild. Berkeley, California. 
One of a series of handy little pocket kinds that are basically easy-to-use keys to the species.

Guides to Specific Groups

Orchids of New England and New York. Nelson, Tom and Eric Lamont. 2012. Kollath and Stensaas Publishing, Duluth, MN. 
This is a handy field guide to all 65 of our subtle to stunning Northeastern Orchids. It is a handy size for the field, has great photos, descriptions and range maps and even mentions look-alikes and how to distinguish them. Another great feature is the photos of fruits and inflorescences in the front of the book.

Field Guide to Orchids of North America. Williams, John G. and Andrew E. Williams. 1983. 
This is a nice small field guide with beautiful full-color illustrations, keys and detailed descriptions. It is a very useful guide for distinguishing orchids in New York and includes a glossary of botanical terms for orchids.

Trilliums. Case, Frederick W. Jr. and Roberta B. Case. 1997. Timber Press. 
This is the most detailed and complete information written about our native trilliums. There is a key to all the trilliums and beautiful photographs and range maps of each species. Here you will find information on horticultural varieties not found elsewhere.


Go Botany. Native Plant Trust
Want to know what that plant is? With our Simple Key, you can identify over 1,200 common native and naturalized New England plants! Almost all Rensselaer County plants are included.

New York Flora Atlas. New York Flora Association, Albany, NY. 
This is the current comprehensive online atlas to the plants of New York. It contains county maps along with photos and information on natural history and taxonomy as well as a list of specimens for each species. There are links to other online resources for each species.

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