Eaglet Download [UPD]
Joelle Harriage
Feedings increase in frequency and amount over time as the eaglets require enormous energy to grow at such an accelerated rate. Slumber often follows a meal, with the eaglets either dozing upright in the nest or laying down. Exercise is vital to developing the strong wing and leg muscles necessary for flight and capturing prey.
A pre-fledge milestone is an activity called branching when the eaglet takes short hops/flights to branches within the nest tree. The young eagles normally branch for up to 7-10 days before fledge, exercising theirs wings and legs, taking short flights to branches in the nest tree. At ten-to-twelve weeks of age, the eaglet is physically ready to fly. Most eaglets fledge around 12 weeks. The timing of actual fledging can be influenced by human activity or disturbance around the nest, causing a premature fledge. This can result in injury or even death of the eaglet. Premature fledglings that fall to the ground can be successfully raised there for a short period by the parents, although predators and humans can pose threats to survival. This developmental stage of newly flighted eaglets can be a most perilous time.
Bald Eagles normally lay one to three eggs per year. There have been a few successful clutches of 4 eggs documented. The eggs hatch after about 35 days of incubation. The eaglets will fledge at about 12 weeks of age.
Baby eaglets come into the world totally helpless. They cannot hold their head up; their vision is limited; their legs are too weak to hold their weight. Bald eagles are altricial, which means they must rely 100 percent on their parents to protect them and care for them.
After hatching, the eaglet will dry off and fluff up to a downy gray. Food will be offered to the eaglet by the parent, who shreds meat off fish or whatever is available. Tiny pieces will be offered again and again as the eaglet struggles to hold his wobbly head still long enough to take the food. In a short time, the eaglet becomes stronger and his eating skills and coordination develop quickly.
Named E21 for its status as the 21st of the birds hatched at the nest, the eaglet was seen Friday afternoon flying off eastward, the neighboring church steeple in the background. Shortly after noon Wednesday the eaglet simply floated down and landed back at the nest.
The eaglet had fledged a few days earlier and had been making practice flights right before lighting out for parts unknown and leaving sibling E22, a few days younger by hatch, sitting forlornly along at the Bayshore Road nest.
Dr. Belinda found that both eaglets were healthy, though DG4 was thin at admission and was not as ready to fly as his sibling. While eaglet DG3 was able to return to the nest site and be reunited with his parents, Dr. Belinda opted to keep DG4 in care since he was not flying well, and there were concerns about the parent eagles keeping up with the increasing demand of feeding three young eaglets. The eagle was transferred to the Wildlife Center of Virginia for continued care on June 9.
Many Dulles Greenway Eagles Cam fans are inquiring about donating to support our program and/or the wildlife rehabilitation center that is caring for eaglets Pat (DG4) and Pi (DG3). Donations may be made on the Eagle Cam donation form to support the Eagle Cam program. Please include a note in the message box if you want your donation to go to the wildlife rehabilitation center and we will pass the money to them. Thank you for your continued support and well wishes. to support the Eagle Cam program. Please include a note in the message box if you want your donation to go to the wildlife rehabilitation center and we will pass the money to them. Thank you for your continued support and well wishes.
Just last year Bonnie and Clyde laid three eggs, but only one eaglet survived to fledge. Cardinal has streamed the lives of bald eagles Bonnie and Clyde at the Bortz Family Nature Preserve for two years now. This is the first year that the organization asked for name submissions, and there were over 100 that came in with interesting and inspiring stories behind them.
Pat, the second Dulles Greenway Wetlands eaglet to fall from the nest this spring, was reunited with its siblings Aug. 31 after spending several months at the Wildlife Center of Virginia in their rehabilitation program.
Another eaglet named Pi, who was under the care of Dr. Belinda Burwell at Wildlife Veterinary Care in Boyce, was released on June 7. Pat and Pi join their sibling Flora and parents Rosa and Martin in the habitat.
Although the N.J. Endangered and Nongame Species Program and Conserve Wildlife Foundation had hoped to band the two Duke Farms eaglets next week, the plan has been scrapped this year for reasons related to the difficulty of getting to the nest. While nothing can compare with witnessing an eaglet banding, here's a consolation prize: ENSP wildlife biologist Kathy Clark generously shared her expertise on the banding process.
Why do you band in early May -- it is a certain point in their development?
We always aim for around 6 weeks of age. The chicks are easiest to handle at that age. Plus, if our timing is wrong by a week on either side, the chicks are still bandable.
How do you get them down from the tree?
We lower them down, one at a time, in a large cloth duffel bag.
What do the eaglets smell like?
If the smell is noticeable, it's usually because of their fish prey.
How many folks are involved in the process, and what do they do?
We usually have two biologists and a wildlife veterinarian with us, and we like to have a few more hands to carry equipment.
Besides banding the eaglets, what else transpires?
We take a blood sample from each eaglet, then take a series of measurements that indicate age and sex. The blood samples are used to measure exposure to environmental contaminants, and more recently we're giving a tiny sample to a researcher who is studying the genetics of the eagle population in the US.
Can you tell the sex at this young age, and if so, how?
The females are larger than males and that difference shows up at the 5-6 week age and becomes clearer as they get older. The measurements we take are usually sufficient to sex them.
How long does the whole process take?
About two hours, sometimes longer if the tree is bigger or more difficult to climb.
Biggest surprise while banding over the years?
It's interesting to find an unhatched egg in a nest; we analyze unhatched eggs for contaminants, which is a different measure than nestlings. We have encountered a couple nestlings that were injured, one by a fishing lure that got stuck in his chest; our veterinarian was there to remove it and successfully treat the wound.
How many eaglets do you band annually?
We have banded about 20 per year in recent years, but I think it will be fewer nests visited this year.
Will you be putting transmitters on any eaglets this year?
We may attach a transmitter to an eaglet in south Jersey.
How many eaglets have you banded over the years?
399 between 1993 and 2014.
Why band the eaglets? What have you learned?
We've learned that eagles of NJ origin nest mostly in NJ but also in NY, CT, MA, PA, DE and MD. The oldest eagle of NJ origin was about 25 years old and had nested on Aberdeen Proving Ground her whole life.
We also know that about 50% of young eagles don't make it, but that once they reach adulthood their survival rate is over 90%. Satellite transmitters are telling us a whole lot more. The movement of young eagles, before they're tied to a nesting area, is wide-ranging, but also shows they will use good habitats repeatedly through the year for roosting and foraging.
What's the farthest away from New Jersey that you have gotten a sighting of an eagle banded in NJ?
Just last year, a young bird was resighted (and then died, unfortunately) in Maine. But our transmittered eaglet from 2014 spent the fall and early winter in a remote area of Quebec, which we would not have known without the transmitter. Those long movements by eagles in their first year may be quite common but have gone mostly undetected.
The 10-week-old eaglet, known as DG4, fell from its family perch in northern Virginia around midnight on Monday. The fall was captured on the Dulles Greenway Eagle Cam, which livestreams the avian family 24/7 to fans from around the world.
The groups that watch over the eagles and maintain the camera, the Dulles Greenway and Loudoun Wildlife Conservancy, located and rescued DG4 from the ground later in the day. The eaglet was still being examined Tuesday and was going to be X-rayed and have its blood tested, but has not shown any signs of an injury, said Terry Hoffman, a spokesman for the group running the eagle cam.
In March, the camera captured the hatching of three new babies on separate days. They're called DG3, DG4 and DG5 but will get official names this week following a naming contest that's been open to the public. Their temporary monikers stand for Dulles Greenway and the order in which they were hatched (Orion was originally DG1 and an eaglet that failed to hatch last year was DG2).
At any given moment, people all over the world are tuning in to watch the eagle family. As the camera livestreamed the eaglets' birth in March, for instance, people were watching from Japan, Australia, Brazil, Russia, Spain, Finland and Canada, among others, Hoffman said.
Many eagles don't survive their first few days of life, with danger coming from predators, storms and even each other. Fans of the Dulles Greenway eagle family were worried not all three eaglets would survive infancy, which is why the naming contest is typically held a couple months after hatchings.
"Human intervention at this stage could cause the eaglets to prematurely leave the nest and be injured," the post said. "There can be no intervention on the nest condition during the active eaglet season. The nest will be assessed and evaluated during off season."
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