DuPont Environmental Education Center

By Shannon Giordano, Public Relations & Social Media Coordinator

Fall is a prime time for planting trees, and Delaware Nature Society has planted quite a few in the last three weeks. Planting trees in the fall can be the best time because the trees are going dormant for the winter and the ground is often very moist, which means when spring comes and the soil starts to warm, the trees will be ready to grow.

In the past several weeks, Delaware Nature Society has planted over 600 trees at three locations. On October 27 at Coverdale Farm Preserve, the planting of 12 enormous Red Oaks and Bicolor Oaks with 9 foot root balls and full canopies began. They were brought in one at a time by truck and are being placed in a section of field that is currently used for feed hay. This planting is part of Coverdale’s 10-year Master Plan. The field the trees were planted in will be turned into a grazing pasture that will house movable animal shelters. These trees were planted in a specific area in order to create a buffer for the Farm’s neighbors, and provide shade and forage for the livestock. All 12 of the trees have been put into the ground and other areas of the farm are designated for reforestation in the future. A big thank you goes to Hank Davis who not only funded the purchase of the trees, but hand selected the trees and is also funding their installation. Hank is a true champion of Coverdale Farm Preserve, and for that we are ever grateful.

Last weekend, two large tree planting events were held on Saturday morning. The first event took place at Middle Run Natural Area where approximately 150 volunteers helped to plant 400 trees. The tree planting is just one aspect of the biodiversity management project that Delaware Nature Society manages at Middle Run under contract with New Castle County. Jim White, DelNature’s Senior Fellow for Land Biodiversity Management, heads up the planting efforts each year. “We are working to increase the park’s forest habitat as well as to increase stream buffers next to Middle Run, which is a tributary of White Clay Creek,” says Jim. Increasing forest habitat provides food and shelter for a wide variety of native wildlife. Stream buffers slow down and filter pollutants and help to reduce erosion. Tree planting also has many other benefits, including making a positive impact on climate change. County Executive, Matthew Meyer also attended the event, lending a hand with the planting. Since 1991, thousands of volunteers have helped to plant about 55,000 trees at this New Castle County park, which is located near Paper Mill and Possum Park roads in Newark.

The second planting event last weekend was held at DuPont Environmental Education Center (DEEC). The Rotary Club of Wilmington planted 200 trees in the Russel Peterson Urban Wildlife Refuge with staff from the DNREC Division of Fish and Wildlife.  The project was funded by members of the Rotary Club who donated $2,000 for the trees along with funding from DNREC. The tree planting is part of an effort over the past 20 years to restore the freshwater tidal marsh with native plants to provide habitat for waterfowl, song birds, deer, raccoon, beaver, and even river otter. The Rotary Club of Wilmington planted the trees as part of a challenge to all Rotary Clubs across the globe. International Rotary President, Ian H.S. Riseley challenged every Rotary club to make a difference by planting one tree for each of its members between the start of the Rotary year on July 1, 2017 and Earth Day on April 22, 2018.

A sincere thank you to everyone who was a part of each of these events!

by Dakin Hewlett, Watershed Education Coordinator

DEEC staff member tags and releases a Monarch Butterfly.

Visitors watch as a DEEC staff member tags and releases a Monarch Butterfly. Photo by John Harrod

Fall not only brings the oncoming burst of changing colors, but also marks the beginning of the monarch butterfly’s incredible migration to Mexico. The DuPont Environmental Education Center highlighted the butterfly’s unique journey at their 4th Annual Marsh & Monarch Celebration on September 23rd. Blue skies and sunshine greeted over 200 people who came out to celebrate the tagging and releasing of 8 monarchs. Leading up to the event, DEEC staff and visitors watched and waited as the reared butterflies transformed from caterpillar to chrysalis and finally to beautiful monarchs ready for release.

When the highly anticipated release date came, eager groups of visitors gathered on the boardwalk with a DEEC staff member to learn about monarchs and their important relationship to the milkweed plant. Adult monarch butterflies lay their eggs on the plant and the caterpillars then eat the milkweed as their sole food source. If you want to attract more monarchs to your garden, planting milkweed is a great way to do just that!

Each butterfly was then tagged with a special tracking sticker for research being done at the University of Kansas. Tagging helps monitor monarch migration patterns and the overall health of the population. Finally, the moment came that we had all been waiting for…A few lucky kids became wide-eyed as a butterfly was placed on their outstretched finger and took a few steps while deciding whether it was ready to take flight. Each time a butterfly took off the crowd clapped and cheered with enthusiasm as the magnitude of the 2,000-mile journey sunk in.

Canoeing the pond.

Canoeing the pond. Photo by John Harrod

Visitors also spent the day enjoying free, interactive activities throughout the marsh. Adults and kids alike enjoyed an on-the-water experience canoeing the pond, learning basic paddling skills, and attempting to navigate the water without getting stuck in the plants.

Many chose to get their feet wet while dip-netting for aquatic animals such as dragonfly larvae, scuds, and small fish. Dip-netting is not only a fun way to explore the pond, but is also a great tool to use when measuring water quality. By studying the biodiversity of the pond, staff members at DEEC can better understand the condition of the water. Guest staff from Stroud Water Research Center echoed that sentiment by providing visitors with a chance to conduct their own water quality tests. Participants turned scientists, learned how to test for pH levels, temperature, turbidity, nitrates, and conductivity with hands on experiments like the one shown below.

A curious visitor uses a turbidity tube to test the clarity of the pond water.

A curious visitor uses a turbidity tube to test the clarity of the pond water. Photo by John Harrod

Inside the nature center many other activities were underway such as “Zuumba like an Animal,” on the 4th floor. If you happened to saunter upstairs you were met with a group of kids hopping around the room like frogs or belting out animal sounds at the top of their lungs.  The 3rd floor stayed jam-packed all day with arts and crafts tables, a bike & kayak raffle sponsored by the Alliance for Watershed Education, and interpreters sharing all things marsh. The “Snapper Lab” on the 1st floor displayed many live animals that call the refuge home such as a black ratsnake, snapping turtle, and green frog. On the way out visitors stopped by to chat with Delaware Nature Society’s Habitat Stewards and left carrying armfuls of free milkweed to plant in their own gardens for the next generation of monarchs. Thank you to all who came out to celebrate and see you next year!

 

Free milkweed plants and art projects to take home after a wonderful day at the marsh.

Free milkweed plants and art projects to take home after a wonderful day at the marsh. Photo by John Harrod

By Guest Blogger: Martha Corrozi Narvaez

Associate Policy Scientist, Water Resources Agency, Institute for Public Administration, University of Delaware

On an unseasonably warm Sunday in February I walked hand-in-hand with my 4-year old son along Wilmington’s riverwalk that parallels the magnificent Christina River. As we walked we passed by couples, families, runners, and people of all types with the musings of ice skaters in the background. My son and I talked about the ducks swimming by, the swift current carrying sticks and other debris and the “mean people” that littered their bottles and trash in the river. I couldn’t help but think that just a few years ago I would not have been able to share this experience with him. I am fortunate to share such an experience with him and I also feel fortunate that I understand the complexity and state of this river.

Christina River on a warm winter day.

Christina River on a warm winter day.

It is easy to see that the Christina River has undergone an urban renaissance resulting in the Chase Center, Tubman-Garrett Riverfront Park, Christina Riverwalk, a variety of restaurants, high-rise residential buildings, the Blue Rocks stadium, and the DuPont Environmental Education Center’s wildlife refuge. This growth is spurred by people’s desire to be near the water and the aesthetic qualities it provides, yet beyond this beauty there is a complex, natural system at work.

The headwaters of the Christina River lie within the state of Maryland and enter Delaware west of Newark. The White Clay, Red Clay, and Brandywine creeks are tributaries of the Christina River. The Christina River is freshwater yet tidal from just south of the town of Christiana to its confluence with the Delaware River at Wilmington. Extensive tidal freshwater wetlands, including Churchmans Marsh, exist along the lower Christina. The majority of the Christina River watershed is located in New Castle County (DE). The Christina River is a mostly urbanized watershed with over 50% of the land cover developed. The watershed is the site of the Port of Wilmington, an important shipping link, and one of the largest importers of orange juice, Chilean grapes, bananas, and automobiles nationally.

Wilmington's Christina Riverfront

Wilmington’s Christina Riverfront

The Christina River has its share of historic contamination. There are numerous contaminated sites bordering the river. Samples have indicated that there are toxics present at elevated levels in the water bodies of the Christina River watershed and fish consumption advisories have been posted for the river. According to the USEPA’s water quality standards the Delaware portion of the Christina River requires varying levels of pollution reduction for nitrogen, phosphorus and bacteria.

Although the Christina River has fallen victim to years of industry, improper land use and anthropogenic influences the story of the river is a positive one. The state is working diligently to clean up and redevelop the toxic sites along the river. The Christina River is also demonstrating improving trends for many water quality parameters. According to a recent article on water quality trends in Delaware’s streams by Gerald Kauffman and Andrew Belden, water quality trend analysis for long term (1970/1980-2005) and short-term (1990-2005) trends show improvement in the Christina River for numerous water quality parameters including: dissolved oxygen (DO), total suspended sediment (TSS), total phosphorus (TP), and total Kjedahl nitrogen (TKN). Positive trends for these parameters indicate improving conditions in the river. Additional parameters, including bacteria, which levels have historically been increasing, show a leveling off for long-term and short-terms trends over this same time period, another good news story.

We know that the Christina River is not a pristine, natural river system yet research shows that there are positive signs for the health of the water body. The efforts by so many locally, state-wide and regionally to improve the water quality has had a positive impact. And as the riverfront becomes more popular and a destination in the region, it is my hope that individuals will learn more about the river and help protect this valuable resource through individual stewardship. And over the years as I continue to walk along the riverfront I will feel fortunate to be able to share this river, which inspires and motivates me, with so many people, especially my son.

Join us at DEEC on April 16 at 3:30pm for National Water Dance to celebrate the Christina River through dance performances and exploration of the marsh for the wildlife calling it home.

To find out more about efforts to improve and protect our waters or how you can have impact, check out the Clean Water: Delaware’s Clear Choice campaign website, Facebook, or Twitter!

Evelyn Williams, Certified Naturalist and Volunteer Guide

Joe Sebastiani, Ashland Nature Center Manager

During the fall and winter months one of our the most frequent sightings in the Russell W. Peterson Urban Wildlife Refuge marsh is of Red-winged Blackbirds sitting on grasses or making short, low flights in small flocks from plant to plant.  Male red-winged blackbirds have black, glossy feathers with red and yellow shoulder patches on their wings. Females are a streaky brown color.

The male Red-winged Blackbird is glossy-black with a red and yellow patch on the wing called an epaulet. The female is streaky brown, and can be mistaken for a sparrow. Note her long, pointed bill, which a sparrow would not have.

The male Red-winged Blackbird is glossy-black with a red and yellow patch on the wing called an epaulet. The female (behind the male in this photo) is streaky-brown, and can be mistaken for a sparrow. Note the long, pointed bill, which a sparrow would not have.  Photo by Joe Sebastiani.

Red-winged Blackbirds are year round residents in this area. In the winter, Red-winged Blackbirds may also be seen flying as part of huge mixed flocks of over a million birds.  These enormous flocks also contain Common Grackles, Brown-headed Cowbirds, and European Starlings.  The flocks roost together at night in marshes and then head out to forage for food during the day.  The Delaware Bay region is known as a huge staging area for blackbirds in the fall and spring.  In fact, most of the entire northeastern North American population of these species stop in the Bay area…over 500 million birds.  (Birds of Delaware, Blackbird Roosts in Delaware.  J.T. Linehan.  pp. 523-4).  Watching these enormous flocks flying overhead is a sight to behold, and really one of the greatest natural spectacles in Delaware.  Listen as they go overhead, and hear the loud “whoosh” as the huge flocks drift past like smoke.  Just don’t open your mouth when you look up!

Some people think of these blackbirds as “ugly” or “dirty”.  Take another look at the individuals.  Grackles and Starlings have beautiful glossy plumage with an iridescence that changes with the light.  Who can deny the brilliant splash of red and yellow on a Red-winged Blackbird’s shoulder?  Appreciate them as adaptable beneficiaries of landscapes altered by human beings; allow yourself to be wowed by their impressive flights; take a finer look at a nearby individual and open your eyes to their subtle beauty.

In winter, Red-winged Blackbirds may fly 40 miles from their night-roosts in Delaware Bay marshes in search of food.  They seek out agricultural areas where they try to gorge on spent corn, as well as a wide range of weed seeds and any insects they can get on the ground.

Red-winged blackbirds are at home in the treeless environment of the marshes at the Dupont Environmental Education Center (DEEC) and perch during the daytime in grasses and cattails.  When spring comes they will nest low among the new shoots of these same marsh plants. Come out to DEEC and see if you can find a few, or a few thousand!