Nov
18
2011
0

Community Supported Agriculture at Coverdale Farm

By Daniel Malcolm, Community Supported Agriculture Farm Manager:

We recently wrapped up the second growing season of the community supported agriculture program at Coverdale Farm. With two seasons now under our belt we can now look back and see the progress we’ve made.

June crop in the CSA farm field. Photo by Ashley Malcolm

The CSA farm membership was 160 this year and the land under cultivation was approximately 6 acres. We grew hundreds of varieties of vegetables and harvested well over 30,000 pounds (all without the help of synthetic amendments). There were five terrific seasonal farm employees who helped plant, weed, and harvest all the crops. Each Monday and Thursday we would be out in the field by 6:30am to begin harvesting for the shareholders, and by 11am were ready to distribute the freshly harvested and washed vegetables.  Our shareholders are a terrific bunch and through weekly pickups and farm events their support has been truly sustaining.

The hoophouse was a new addition in 2011. The added heat and protection allowed us to harvest our first tomatoes June 20! Photo Ashley Malcolm

Registration for CSA is limited for 2012 so if you’re interested in registering, contact Fiona to get on the waitlist (302) 239-2334 x. 134.

An abundant August half share. Photo Ashley Malcolm

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Written by Joe Sebastiani in: Coverdale Farm | Tags: ,
Nov
16
2011
4

Costa Rica Trip 2011

By Joe Sebastiani, Seasonal Program Team Leader

Ten Delaware Nature Society members accompanied me to Costa Rica over the last few weeks for a trip entitled, “A World of Nature”.  It sure was!  Led by Jose Saenz working for Collette Vacations, we were treated to 12 days of rainforests, 220 species of birds, 4 species of monkey, reptiles, amphibians, butterflies, rubber spiders, a volcano, white-water rafting, lots of good food, and some heavy rain periodically.  We were in the rainforest after all. 

Tortuguero National Park was our first destination.  Our lodge was accessible only by boat, as is everything in the park.  Boat trips through the swamp forest occupied our time there, as did birding on the grounds of the beautiful Evergreen Lodge.  If you have never been to the tropics before, the birds can be completely overwhelming on day one.  More than once, I had to tell our group to “take a deep breath…take it one bird at a time”.  A swirl of toucans, trogons, warblers, tanagers, hummingbirds, flycatchers, and euphonias bent the eye and mind in the first hour of light.

We took three nature explorations by boat the first day of the trip.  The video below highlights some of our special sightings including a daring water rescue of a Three-toed Sloth, a White-faced Capuchin Monkey leaping about 45 feet out of a tree, and Great Curassow, one of our really good species we found on the trip.  There will be more to come about our fantastic trip, but for now, enjoy the video…

 

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Nov
15
2011
0

Back to Blackwater

By Jason Beale, Abbott’s Mill Nature Center Manager

Blackwater National Wildlife Refuge near Cambridge, Maryland is a popular location for naturalists in the winter.
Blackwater NWR near Cambridge, Maryland is a top location for winter wildlife watching on Delmarva. Photo by Ellen Sebastiani.

As the days shorten and leaf fall continues, birdwatchers begin to focus in on the legions of returning waterfowl and wintering raptors that fill the marshes and fields of the Delmarva Peninsula.  Few destinations are as unique and productive than Blackwater National Wildlife Refuge, near Cambridge, Maryland.  Along with legions of Ducks, Geese, and Swans, the refuge hosts a tremendous number of wintering Bald Eagles – more than any other site on the East Coast, north of Florida.  But wait, there’s more!  Each year a few Golden Eagles find the vast, open habitats suitable for making a living during the winter.  In and around the forest, another distinct species keeps busy – the endangered Delmarva Fox Squirrel.  This large, grizzled-gray squirrel only makes it home on the peninsula in scattered patches of open forest.

Despite being well-known winter residents, experiencing the sights and sounds of thousands of Snow Geese in close proximity is exhilarating. Photo by Joe Sebastiani.

Once again, Delaware Nature Society is offering a trip to Blackwater on Wednesday, December 7th.  Groups will depart from both Abbott’s Mill Nature Center in Milford and the DuPont Environmental Education Center in Wilmington.  Both groups will depart from their respective sites at 7:30am and return around 4:30pm.

Tundra Swans are one of Delmarva’s largest bird species. Photo by Joe Sebastiani.

We’ll stop briefly at the visitor’s center before beginning our tour.  We’ll then travel the wildlife drive auto tour, with periodic stops and short hikes in wooded areas.  After a short lunch, we’ll tour the refuge perimeter and open marshes that fringe the Chesapeake Bay area.  Time permitting, we’ll venture to the Cambridge waterfront to look for Canvasback, Redhead, and other bay ducks that winter in the area.

Golden Eagles, like this juvenile, regularly winter at Blackwater. Photo by Derek Stoner

Blackwater Wildlife Tour

Wednesday, December 7th

Abbott’s Mill Nature Center: 7:30am-4:30pm

Member/Non-Member: $22/$30

DuPont Environmental Education Center: 7:30am-4:30pm

Member/Non-Member: $22/$30

To register, contact Fiona Smith at (302) 239-2334 x. 134. Dress for the weather and bring a bag lunch.

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Written by jasonbeale in: Birds | Tags:
Nov
14
2011
0

Baby Birds: A Dove Story Part 3

By Derek Stoner, Conservation Project Coordinator

One of the two fledglings that left the nest on June 22, 2011, completing the second nesitng cycle. His first flight took him 20 feet to the roof of the conference room. Image by Derek Stoner.

After the first brood of Mourning Dove babies fledged on April 14, I kept an eye on the nest in case the doves decided to return to nest again.  Five weeks later, on May 24, I found the female dove sitting on the nest, incubating one egg.  Doing a quick calculation based upon the first nesting cycle, I circled June 22 on the calendar: Fledge Time!

Over the next couple weeks I sneaked looks at the nest and saw the female obviously brooding her babies.  On June 10 I peered into the nest while the female was away, and saw the two fledglings with pin feathers growing out.  On the afternoon of June 22, after a day of Middle Run Bird Experience camp, I checked on the nest and found the full-grown fledglings sitting on the lip of the nest, tipping back and forth.  I grabbed my camera and watched as both babies made their first flight, landing on the metal roof above the conference room.   They then flew away to join the adult doves.  

The final two Mourning Dove fledglings of the summer perch on the edge of the nest just before flying on August 18, 2011. image by Derek Stoner.

Amazingly, the cycle repeated once again in the late summer, with egg-laying initiated on July 21.  Simply doing the math again allowed me to predict a fledge date of August 18.   On the afternoon of the 18th, I photographed the two baby doves sitting on the edge of their nest.  Returning an hour later, they were no longer in the nest and could be seen perched on a nearby rock wall.  (The “scaly” feather pattern makes young doves very distinctive looking).

Mourning Doves are one of the most adaptable and prolific birds in North America. Image by Derek Stoner.

So the final tale of the tape is this:  3 nesting attempts over the course of 5 months resulted in 6 eggs layed and 6 healthy young fledged– all from one nest!  Now it is open to debate whether or not the same female Mourning Dove kept re-using the nest, or if another female took over a favorable nesting spot.  My bet is on the single female theory. 

There is so much more to be learned about Mourning Doves and their fascinating Life History.  A very common and prolific species, they are found nesting in all 48 contiguous states and are thought to be one of North America’s most numerous bird species.

Most importantly, we have a few special lessons from this series of observations that pertain to baby birds and nests.

1.  Birds Cannot Smell Well.   A bird’s sense of smell is very poor and they cannot detect the scent of humans.  If you touch a baby bird and place it back in its nest, the parent birds will not abandon the baby because they can detect your scent.  True, some birds like vultures can smell well, but most songbirds do not have a well-developed nose.

2.  A Baby Bird out of the Nest is Helpless:  When you come across a baby bird on the ground, unable to fly, chances are good that it simply waiting to be fed by its parents. Leave it alone.  Adult birds will follow their fledged young around for at least a couple weeks after the young leave the nest. 

 3.  Birds Come Back and Use the Same Nest Each Year:  For most songbirds this is not true.   In most cases, the nest will get too damaged and weathered by exposure to the elements over the winter.  Upon returning next spring, the adult songbirds may build a nest nearby, but they will not use the same nest structure.  Notable exceptions are birds like Barn Swallows and Eastern Phoebes that build their nests under the protective cover of ledges or roofs.  In the case of these Mourning Doves, they adopted a American Robin nest built under a protective ledge– a case of being resourceful. 

I hope you have enjoyed reading this series of stories, seeing the photos of amazing baby birds, and learning a bit more about the fascinating life of nesting birds.  There is an incredible amount to be learned about wildlife simply by being a careful observer.

What baby bird stories do you have to share? 

Resources:

Myths About Nesting Birds, from the Cornell Lab of Ornithology’s popular NestWatch program, does a great job of dispelling some other common mis-nomers about nesting bird biology.

Our friends at Tri-State Bird Rescue do a fantastic job of educating the public on how to better understand baby birds and prevent unnecessary “birdnapping” incidents when baby birds are taken from their parents by good-intentioned humans.

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Written by Derek Stoner in: Ashland Nature Center,Birds | Tags: , , ,
Nov
11
2011
1

Baby Birds: A Dove Story Part 2

By Derek Stoner, Conservation Project Coordinator

Continuing with our story…

A 7-day old Mourning Dove nestling resting in hand. Image by Derek Stoner, April 6, 2011.

The pair of baby Mourning Doves grew quickly, and five days after their first photo session I visited the nest again.  The adult female, who sat on the nest brooding(warming) the young, flew away when I approached within 6 feet of the nest.  I picked up the baby, noted that it seemed to have doubled in weight in just 5 days, took a couple photographs, replaced it in the nest, and watched the adult dove come right back to feed the babies.  At this point, the babies were eating a diet of regurgitated seeds. 

Notice in the above photo how the feathers are emerging  in orderly lines called tracts.   At this stage, the feathers are not providing much warmth or insulation, so brooding by the female is critical to keep the babies protected in cold conditions.    

A fully-feathered baby Mourning Dove at 12 days of age. Image by Derek Stoner, April 11, 2011.

Just five days later, on April 11, I visited the nest for the last time.   I knew the babies would be close to fully-feathered and getting ready to fly in a matter of a few days.  This time the young dove more than filled my hand, its long wings and tail hanging over the edge of my palm. Its weight had certainly tripled in just 12 short days of life.  The fresh, full-grown feathers on the baby dove gave a very “scaly” pattern to its body.    

I carefully placed the dove back in the nest beside its just-as-big nestmate.  The youngsters’ bodies spilled out over the edges of the nest and there is no way an adult dove could not sit atop these babies anymore!

In the late afternoon of April 14, I decided to check on the nest, thinking the babies would likely be ready to fledge.  In a stroke of luck(and with a co-worker as witness) , we watched the baby Mourning Doves perched on the edge of the nest.  With the adult doves walking anxiously on a nearby rock wall, suddenly both baby doves took off in a whir of brown and white.  Their wings felt the rush of air beneath as they experienced flight for the first time. 

In just 15 days, the baby doves transformed from a helpless naked chick with eyes closed, to a sleek and speedy flighted bird capable of speeds exceeding 60 miles-per-hour.  The whole nesting cycle took exactly one month, from nest building to egg laying to hatching to fledging.  Amazing!

Stay tuned for Part 3, where we look at the important lessons learned from these baby Mourning Doves and how this story can help us dispel some common myths about birds.

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Nov
10
2011
0

Baby Birds: A Dove Story

By Derek Stoner, Conservation Project Coordinator

Travelling back in time to Spring, let’s re-visit an amazing series of observations:

As surely as April showers gave way to May flowers, so does the world of birds spring forth with new life.  Everywhere you look, birds are building nests, incubating eggs, and feeding babies.  Baby birds grow quickly and in seemingly no time at all are ready to leave the nest.   During this critical time of pre- and post-fledging, baby birds sometimes have difficulties and wind up in the hands of a concerned human.  The following is a story to help us all better understand the world of baby birds.

A female Mourning Dove sits on her nest, incubating two eggs. Image by Derek Stoner, March 28, 2011.

On March 15 we noticed a pair of Mourning Doves outside of the Ashland Nature Center conference room, courting and then mating.  Within minutes, both doves could be seen carrying small twigs up to the top of a stone support pillar, where a protected shelf area would hold their nest.  Interestingly, the doves built their nests atop an American Robin nest from the year before. 

On March 18, I checked the nest and found two white eggs.  Every single Mourning Dove nest I have ever seen contains two eggs, so I knew that the clutch was complete and the female would start incubating the eggs.  With an expected incubation period of 14 days, that meant the eggs should hatch on March 31.

A 2-day old Mourning Dove nestling, or squab, nestled briefly in the palm of my hand. Image by Derek Stoner, April 1, 2011.

The last two weeks of March had typically cold and wet weather, with some night plunging below freezing  and a low of 25 degrees on March 25.  Through it all, the female Mourning Dove stayed on the nest, keeping the eggs at a constant 102 degrees F.   On schedule, two tiny, naked nestlings entered the world on March 30.

On April 1, I visited the nest and began the careful documentation process of these baby birds.  With the mother away briefly, I lifted one baby dove out of the nest, held it in my palm, and snapped a few photos with my other hand.  Replacing the baby in the nest, I watched the mother return within less than a minute.  Although I could not see the activity, I could tell that she was feeding her babies. 

Mourning Doves (and other members of the pigeon/dove family) feed their young “crop milk” which is an extremely nutritious protein-enriched fluid excreted by the crop of both male and female doves.  For the first few days of life, baby Mourning Doves are fed an exclusive diet of crop milk.   Not surprisingly, this diet helps the babies grow very quickly!

Stay tuned for part two of this story, and see how these baby Mourning Doves grew and successfully fledged from the nest.   

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