Posts tagged ‘birds’
In the summer of 2013 a specimen lacebark pine (Pinus bungeana) at the National Museum of Natural History had been in decline for several months. An investigation by Greg Huse, Smithsonian Gardens arborist, found very large girdling roots growing just below the soil surface. In his report Lacebark Pine # 122 Evaluation at NMNH he determined there was little to no chance that the tree could be rehabilitated. Within two months of issuing the report the tree turned completely brown and it was clear that it need to be removed.
Or did it? Could the once stately pine on the corner of Madison Drive and 9th Street that formed the border between the Butterfly Habitat Garden and the newly established Urban Bird Habitat find a second life?
As a mature specimen of this slow growing pine the tree exhibited extraordinary exfoliating bark in a patchwork of white, olive, light purple and silver. The multi-stemmed trunk was a striking structural element in the landscape that would be a significant loss. Luckily, there was a way to save this feature and in doing so support wildlife enhancing the value and educational lesson of the space. The tree was the perfect candidate to become a snag.
By turning the soon to be rotting trunk and branches into a snag it gains a new purpose in the Urban Bird Habitat serving as a space for nests, nurseries, storage, foraging, roosting and perching for birds, small mammals, and other wildlife in the city.
Here is how we did it:
The garden is a dynamic landscape and one must be prepared to deal with the changes that nature brings. Through creative thinking the Smithsonian Gardens’ staff discovered a great opportunity to turn what could have been a significant loss to gardens into a valuable resource. Today many museum visitors stop to look at this unique tree along the National Mall. Most seems puzzled by its presence but their questions are answered by the Snag interpretive panel.
So what do you think? Does your garden have a spot for a snag? Please share your thoughts in the comments below.
-James Gagliardi, Smithsonian Gardens Horticulturist
Living with Wildlife: Snags – The Wildlife Tree from the Washington Department of Fish and Wildlife.
Working in collaboration with Richard E. Gies, lead volunteer of the Longwood Gardens Bluebird Project, Smithsonian Gardens established an Eastern Bluebird Habitat trail around the perimeter of the Greenhouse facility in Suitland MD.
A native songbird, the Eastern Bluebird (Sialia sialis) is a member of the thrush family (Turdidae). They eat insects and berries and require open grassy areas and meadows with low groundcover for feeding. These beautiful birds breed in all eastern states from Maine to Florida. They are considered to be secondary cavity nesters in that they traditionally nest in holes made by woodpeckers and other birds.
The nesting boxes were installed to benefit an existing population of Bluebirds as well as to encourage more bluebirds to nest on site. Eastern Bluebird populations are on the rise thanks, in part, to efforts like this one. The lack of suitable nesting cavities caused by changing land use patterns, increasing urbanization, and competition from introduced European starlings and house sparrows has been responsible for the decline of Eastern Bluebirds populations in the past.
When is a pair of nesting boxes better than one?
In areas where Eastern Bluebirds coexist with Tree Swallows (like Maryland) it is recommended that two boxes be placed 15-20 feet apart. Tree swallows will select one box for nesting and defend the other against use by other swallows thereby allowing Bluebirds to claim it.
A Green Roof: for style and comfort.
The roofs on these nesting boxes have been planted with a variety of stonecrop (sedum) plants. The purpose of the “green roof” is to help keep the interior of the boxes cool during the hot summer months.
The temperature inside these nesting boxes will be monitored in an effort to ensure the safety of the fledglings (baby birds).
The green roof nesting boxes were designed Richard Gies for Longwood Gardens. You can download a PDF of his instructions here: