Conserve Wildlife Blog

Archive for the ‘Raptors’ Category

Reduce, Reuse, Recycle!!

Wednesday, May 8th, 2013
Single use plastic bag wrapped around ospreys neck…

by Ben Wurst, Habitat Program Manager

We had quite a scare last week, on April 30th around 12:30pm, after getting a report from an observer of our Osprey Cam on our Facebook page. A single use plastic shopping bag had gotten wrapped around the neck of the incubating female. After getting the report we started to monitor the situation to see how it would unfold. The bag was loosely wrapped, so we hoped she would be able to free herself…which she did after an hour.

Here you can see the single use plastic bag around her neck.

Here you can see the single use plastic bag around her neck.

A lot of viewers and FB fans were asking why we weren’t going out to remove the bag from her neck. We answered each and every question to help make sure people knew that we were doing everything we could to protect her safety. First, we couldn’t just walk out to the nest (which is out in the middle of the salt marsh) without the female reacting to us and flying off the nest (with the plastic bag around her neck). Her flying off the nest with the bag around her neck would have only caused even more harm to her. She could have gotten snagged on a piece of nesting material and in the struggle could have choked to death or she could have fractured one of her eggs… Second, if she would have been tied down to the nest, then we would have enacted a plan to go out to the nest (after a certain amount of time) and released her. Our policy is that we will only intervene if it is a life or death situation. When we enter their nest sites we introduce stress to the birds which can ultimately do more harm than good. Finally, at least we have a camera to monitor the nest! Think of all the other 500+ nests in New Jersey where we only go out to monitor them once or twice during the nesting season. So much plastic winds up in osprey nests that it is a serious concern. People need to be more aware of their surroundings and do their best to make sure waste is properly disposed of.

There are ways you can help make a difference:

  1. Reduce the amount of stuff you buy and the amount of trash you produce
  2. Reuse what you can, recycle what you can’t
  3. Pick up litter when you see it. There is a great movement in Australia called “Take 3” and their message is simple: “Take three pieces of rubbish with you when you leave the beach, waterway or… anywhere and you have made a difference.”  
  4. Stop or reduce your dependence on single use plastics
  5. Use reusable shopping bags
  6. Don’t release balloons!
The female struggles to get free of the bag.

The female struggles to get free of the bag.

Statistics for plastic recycling are dismal… According to the U.S. Environmental Protection Agency “In 2010, the category of plastics which includes bags, sacks, and wraps was recycled at almost 12 percent.” We’re lucky that she was able to free herself. This just proves that ospreys do not have an easy life. There are many threats to ospreys and they have very high mortality rates, which are around 80%.

On the positive side, the female and male continue to incubate three eggs at Edwin B. Forsythe NWR. We should start to watch for hatching around May 19-20th. We have been writing nest news with other life history information on a weekly basis on our Osprey Cam page.

 

Re-sighting New Jersey Eagles

Wednesday, April 10th, 2013

Looking for green bands.

by: Larissa Smith, wildlife biologist/volunteer manager

One way we can track eagles is with transmitters which I’ve discussed in previous blogs. Since 2011 three eagle chicks have been outfitted with satellite transmitters to track their movements. Two of the birds have since died. To follow the movements of the third eagle go to http://www.merrillcreek.com/eagletracking.html

Eagle banded C/84 © Peter Stegemann

Eagle banded C/84 © Peter Stegemann

Another way to track eagles is by banding them.  The NJ Endangered and Nongame Species Program has been banding eagles with green (NJ specific) bands since 1987.  Eagles are banded when they are six weeks of age and get a green NJ band on one leg and a silver federal band on the other.  The state band has a letter over a two digit number. The band information is entered into the National Bird Banding Lab database and when someone finds an injured or dead eagle they can report the band. Most of the information that comes in from these bands are from dead or injured birds. The bands tell us when and where the the bird was banded. By using spotting scopes people can sometime see that a bird has green band but many times are unable to read the number.  We know that  23 pairs of eagles nesting in New Jersey have at least one bird in the pair that was banded in NJ.

Eagle banded D/64© Justin Pursell

Eagle banded D/64© Justin Pursell

Sometimes we are lucky to get re-sightings from photographers with high powered lenses who can focus in on the band.  Just in the past week we’ve gotten three sightings of NJ birds.  One eagle has been seen on Long Island with a green band and reported by Peter Stegemann. He has seen this bird all last summer and fall with another eagle and they might be nesting this season. This would be the first pair of eagles to nest on Long Island since DDT wiped out the eagle population. By zooming in on the photo ENSP principal biologist Kathy Clark was able to read the letter and first number as C/8.  The second number couldn’t be read but by going through the banding records it was determined that this eagle was banded in 2009 at the Princeton nest.

Eagle banded D/39 © Kristen Nicholas

Eagle banded D/39 © Kristen Nicholas

 

Another NJ banded bird (D/64) was photographed by Justin Pursell in Schwenksville, PA on April 7th, 2013. The eagle hasa nest in the area.  The bird was banded May 10, 2004 at the Hopewell West nest in Cumberland County.  Kristen Nicholas took a photo of a third  year NJ banded bird at Lake Tappan Northern NJ/Lower NY on March 20, 2013. The green band is D/39  a third year male which was banded in 2011 at the Oradell Reservoir in Bergen County NJ.

While it’s great to get re-sightings of NJ banded birds we don’t want to get them at the expense of the eagles. These photos were taken by photographers with high powered lenses. People should view eagles from a safe distance so as not to disturb them, especially when they are nesting.  Disturbance to a nest can cause the eagles to abandon the eggs/young or cause the young to prematurely jump from the nest.

To report a banded eagle please contact Larissa Smith Larissa.Smith@conservewildlifenj.org

Volunteers Survey New Jersey’s Eagle Population…

Friday, February 8th, 2013

…during the 2013 Midwinter Bald Eagle Survey

By Larissa Smith, Biologist/Volunteer Manager

Shark River © Dennis Ruffe

Shark River © Dennis Ruffe

Every January NJ participates in the National Midwinter Eagle Count.   Volunteers surveyed for eagles statewide during the weekend of January 12th & 13th.    Due to dense fog the visibility was poor in many of the survey areas but despite this the total count was  297 bald eagles.  This is 38 less than 2012′s high count of 335 bald eagles.  Four golden eagles were also counted during the survey.

2013 Midwinter Eagle Survey Results

  • Southern NJ: 264 bald eagles
  • Northern NJ: 33 bald eagles
  • Total bald eagles: 297

Thank you to all volunteers who participated!

February is a great time to get out and view eagles in New Jersey.  So far twenty-one pairs of eagles are incubating (on eggs) while others pairs are busy getting ready for the season.  Not only can you spot resident birds this time of year but wintering eagles as well.  The Cumberland County Winter Eagle Festival takes place this Saturday the 9th. This is a good opportunity to see eagles and other raptors and learn more about them.  I’ll be there at the CWF table so stop by and say “Hi”.

For more information on the festival: http://www.conservewildlifenj.org/events/v/011/2/2013/09/

 

Tracking eagles in NJ

Friday, February 1st, 2013
Merrill Creek female with transmitter May 29, 2102© Kathy Clark

Merrill Creek female with transmitter May 29, 2102© Kathy Clark

Update On Merrill Creek Birds

By Larissa Smith Wildlife Biologist/Volunteer Manager

Back in August I wrote a blog update on two eagles fitted with transmitters at Merrill Creek Reservoir.

http://www.conservewildlifenj.org/blog/2012/08/06/a-year-in-the-life-of-a-juvenile-eagle/

The male eaglet was fitted with the transmitter in July 2011.  In September 2011, the male flew as far west as Harrisburg, PA, and in January 2012 spent a few days in the upper Chesapeake Bay in Maryland.  After that he spent the majority of his time in New Jersey and eastern Pennsylvania.

In early January, 2013, biologists became concerned when the signal from the transmitter was not moving.  A team of biologists from the ENSP’s Clinton office went out to search the area but were not able to locate the bird.  Another attempt was made on January 18th and the bird was found dead in the shoulder of the highway.  The carcass was saved for later examination to determine the cause of death, though we suspect it was struck by a vehicle.  The transmitter was still attached to the bird, and it will be refurbished and placed on another eaglet this nesting season.

So far, two out of the three eaglets outfitted with transmitters have not survived.  Juvenile eagles have a high rate of mortality as they learn to live on their own and aren’t yet the most skilled hunters or fliers.  We are learning a lot about these young eagles and their habitat choices and migratory movements.  Unfortunately, we are also learning that they face many perils in the wild, as we have seen with the first eagle infected with West Nile virus, and the second struck by a vehicle.

In May, 2012, a transmitter was placed on the largest of three eaglets in the Merrill Creek nest.  She fledged in July and remained in the nest area until September 10, when she took a quick flight south.  She continues to be tracked around the southern tip of the Delmarva Peninsula in coastal Virginia, a favorite wintering area for many immature eagles.  To follow her movements (and to see the movements of the other eagles) go to: http://www.merrillcreek.com/eagletracking.html.

Large turnout expected for osprey platform build day

Thursday, January 17th, 2013
Conserve Wildlife to repair or replace any platforms lost from Sandy

by Ben Wurst, Habitat Program Manager

Osprey pair in nest platform repaired by CWF staff in early 2012. © Brian Kushner

Osprey pair in nest platform repaired by CWF staff in early 2012. © Brian Kushner

On Saturday, January 19, Conserve Wildlife Foundation of NJ (CWF) will host an osprey platform construction day from 10:00 am to 3:00 pm at Tuckahoe Wildlife Management Area in Woodbine, New Jersey. Volunteers who signed up in advance are helping to build up to 20 new platforms to replace those lost or damaged in Superstorm Sandy.

Constructing these platforms now will allow CWF time to install them before the start of the osprey nesting season in April. Ospreys mate for life and typically return to the same nest year after year.

Since Sandy slammed into the coast of New Jersey in late October, biologists with CWF have been actively surveying and assessing damage to habitat that wildlife needs to survive. Many osprey nesting platforms were right in the middle of the high winds and strong storm surge associated with Sandy. The majority of the platforms weathered the storm; others need repairs or must be replaced. We have already installed 5 new nesting platforms. Two platforms were installed on December 1st on Herring Island (N. Barnegat Bay) in an area of homes that sustained significant damage. The other three platforms were installed in the Wildwood area.