DuPont Environmental Education Center

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By Jim White: Senior Fellow for Land and Biodiversity

The Christina River has been one of my favorite Delaware canoeing and kayaking destinations for many years. Cruising with the tide on a late summer day is about as relaxing as it can get.  However, if you are like me, the best part of the experience is searching for wildlife such as American Beaver, Great Blue Herons or basking Northern Red-bellied Cooters and soaring Ospreys.  In the last several years, thanks to my friend Hal White (no relation) I have become very interested in dragonflies and the Christina River is a great place to see several of our common species. Scanning the spatterdock and cattails and other shoreline vegetation can result in observing colorful species such as Green Darner, Twelve-spotted Skimmer, Spangled Skimmer and Blue Dasher. However, my favorite species that makes the Christina its home is the Russet-tipped Clubtail.

A Russet-tipped Clubtail photographed by Jim White on the Christina River.

A Russet-tipped Clubtail photographed by Jim White on the Christina River.

This large species of dragonfly is only found on tidal freshwater rivers and is not particularity common elsewhere in Delaware. Hal White, in his book Natural History of Delmarva Dragonflies and Damselflies, wrote that this species was not recorded in Delaware until 2003 when a University of Delaware student collected it on the Christina River for his required insect collection. Why the species was not recorded earlier is a bit of a mystery but Hal speculates that large tidal rivers are not a place that most skilled dragonfly enthusiasts think of checking for uncommon species.  Since the 2003 lucky find, Hal has confirmed that the Russet-tipped Clubtail is actually fairly common on the river from August through mid-October.  However, although I had been up and down the Christina River many times over the years, I had never noticed this what I now consider, a rather conspicuous insect. That is, until 2008 when Hal and I mounted a mini-expedition by canoe to photograph this handsome dragonfly for his upcoming book.   It did not take long after putting-in, that we observed several Russet-tipped Clubtails patrolling low over the water.  But photographing flying dragonflies from a shaky canoe is a bit of a challenge to say the least.  Lucky for me though, one of them perched on an overhanging branch just long enough for me to get a few photos – mission accomplished.  So if you have a chance to get out along the Christina River keep your eyes peeled for Russet-tipped Clubtails.

A Russet-tipped Clubtail in flight, photographed by University of Delaware Professor, Dr. Michael Moore.

A Russet-tipped Clubtail in flight, photographed by University of Delaware Professor, Dr. Michael Moore.

Check out the next canoe trips on the Christina from the DuPont Environmental Education Center and see what you can find: Saturday, September 26 and Saturday, October 17

Natural History of Delmarva Dragonflies and Damselflies  by Hal White available at the Ashland Nature Center, DuPont Environmental Education Center, or on Amazon.com.

By John Harrod: Manager, Dupont Environmental Education Center

Blooming right now in the Russell W. Peterson Urban Wildlife Refuge is a great shrub of utility and beauty. The common elderberry (Sambucus Canadensis), also known as American elder, can be found throughout Delaware and along the Eastern U.S. from Canada to Florida. Elderberry is a pioneer species and sprouts rather quickly in areas of disturbance. Its haunts are wet areas including stream banks, ditches, moist meadows, marshes and swamps, which is why it can be found in our refuge.

Common Elderberry blooming along the boardwalk trail at the Dupont Environmental Education Center.  Photo by John Harrod

Common elderberry blooming along the boardwalk trail at the Dupont Environmental Education Center. Photo by John Harrod

This deciduous multi-stemmed shrub tends to have an arching habit and grows to 12 feet tall. Elderberry is quite vigorous and responds to pruning well, and will become quite dense through sucker growth making it a nice screen. Carpenter bees and mason bees tunnel into its soft pith of broken stems to construct nests for their young.

Common elderberry produces masses of white flowers in large umbels. The flowers are quite fragrant and attract many pollinating insects. The flowers are sometimes used to make elderflower water which is used in perfumes.

A close-up view of the Common Elderberry flower.  Photo by John Harrod.

A close-up view of the common elderberry flower. Photo by John Harrod.

After the blooms, elderberry produces fruits that are relished by at least 50 kinds of birds including American Robin, Cedar Waxwing, and Tufted Titmouse. People enjoy them too. Raw elderberries have an unpleasant taste and contain small amounts of poisonous alkaloids, so cooking is the way to go. The heat of cooking removes the toxins and improves the taste leading the way to delectables like jelly, preserves, pies, and wine.

The small fruits of the elderberry, which we will see later this summer, are eaten by a wide variety of birds.  Photo by H. Zell.

The small fruits of the elderberry, which we will see later this summer, are eaten by a wide variety of birds. Photo by H. Zell.

The refuge is open dawn to dusk daily, so come out and see the elderberry for yourself as well as the many other bloomers including the sweet scented Sweetbay Magnolia. While there, stop inside the DuPont environmental Education Center and ask a naturalist to lead you on a walk to find more plants.

By Jim White, Associate Director, Land and Biodiversity:

Ringing cell phones can be an interrupting bother, and sometimes I yearn for the days when phones resided in buildings or on street corners, not in your pocket. However, last Tuesday, while at the Dupont Environmental Education Center (DEEC) in Wilmington for a meeting, I was very thankful for the new phone technology. While also at DEEC that morning, past DNS board member Greg Inskip observed a snake that he was not familiar with, and immediately took several photographs of the snake on his cell phone. Greg then showed the photos to Joe Sebastiani who immediately called me (cell phone to cell phone), reporting that he thought he was looking at a photo of a Queen Snake (Regina septemvittata), a snake rarely observed on Delmarva.  Within minutes I was able to see the snake photographs myself, and concur with Joe’s identification.  It was indeed a Queen Snake – the first to be found at or near the Russ Peterson Urban Wildlife Refuge where DEEC is located, making it a very exciting find.

This is the Queen Snake found by Greg Inskip at the Dupont Environmental Education Center on October 22, 2013.  Photo by Greg Inskip

This is the Queen Snake found by Greg Inskip at the Dupont Environmental Education Center on October 22, 2013. Photo by Greg Inskip

The Queen Snake typically is found in relatively high quality freshwater marshes or streams. It also seems to live only in areas that have healthy populations of crayfish, on which it feeds.  The marshes at the Peterson Refuge have undergone extensive restoration over the last 15 years by the Delaware Department of Fish and Wildlife. This restoration has greatly increased the overall health of the refuge’s marsh ecosystem, which probably explains why we are finally seeing the Queen Snake inhabiting the refuge.

This relatively small to medium-sized snake rarely grows longer than 42 inches. It is the most aquatic snake in our area and spends much of its time searching underwater for crayfish that have recently shed their exoskeleton and become “soft-shelled”.  Its “eel-like” slender brown body, with yellowish lateral stripes running from the nose to tail, is perfect for slipping into crayfish burrows and under debris. This snake rarely bites when handled, but like many snakes, it will emit a strong musky-smelling fluid. 

So while cell phones may be a pain at times, I encourage you to use them to photograph any amphibian or reptile that you find and to call me or send me a text message to report your find (302-593-9622).  

Jim White, author of Reptiles and Amphibians of Delmarva, took this photo of a Queen Snake on May 21, 2013 near Middletown, DE.

Jim White, author of Reptiles and Amphibians of Delmarva, took this photo of a Queen Snake, sunning in a shrub, on May 21, 2013 near Middletown, DE.

By John Harrod, Manager, DuPont Environmental Education Center

The Russell W. Peterson Urban Wildlife Refuge has a new Osprey nesting platform. DNS worked with Cristina Frank, senior environmental scientist with Pepco Holdings, to install a new platform near the DuPont Environmental Education Center. It can be easily seen at eye level as you cross the bridge to the building. 

Platform photo by John Harrod

New Osprey nesting platform near the DuPont Environmental Education Center. Photo by John Harrod.

This is the second nesting platform in the refuge. The first, which has had an active Osprey pair for eight years, was originally put up as a new home for the birds after they built a nest on transmission lines. The location of the new platform is far enough away that two pair can reside in the refuge without incident. 

Osprey pair Jim White.

Original Osprey pair on the first nesting platform. Photo by Jim White.

To help encourage a second pair of Osprey to take up residence on the new platform, it is seeded with an armload of branches.

nesting platform by Jim White

Seeding the platform with branches to encourage new Osprey residents. Photo by Jim White.

The latest platform was installed as part of a larger project to replace the old, wooden transmission lines passing through the refuge. Pepco will be installing line markers, including spiral bird diverters, to increase the visibility of the new power lines and prevent collision.

Bird Flight Diverter

Spiral Diverter

We look forward to welcoming a second pair of Osprey to the refuge. Join us at DEEC on Saturday, April 21, for the DNS Earth Day Festival to meet Cristina Frank, learn how new transmission lines are built to protect birds, and hopefully see our newest residents.