American Kestrels At Duke Farms Receive Some Bling!

An American kestrel nestling in my hands.  Photo by M. Hall
An American kestrel nestling in my hands. Photo by M. Hall

Just a couple of days ago, American kestrels at Duke Farms in Hillsborough, NJ received some jewelry that will help biologists learn more about their migration and annual whereabouts in an attempt to fill in important data gaps about their habits.

Female kestrels received a leg band and more importantly, a geolocator, that will record the sunrise and sunset each day, which will in turn, allow us to determine where in the world these kestrels are on any given day.

Read more about this experience at the Duke Farms blog, Behind the Stone Walls.

Reduce, Reuse, Recycle!!

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

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…

…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

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

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.

Barn Owl Box Housekeeping

by MacKenzie Hall, Private Lands Biologist

Barn Own Box Housekeeping
A very productive nest box! Photo by Pat Hilton

I read that a barn owl was once seen delivering 16 mice, 3 gophers, a rat, and a squirrel to a nest in just half an hour.  And after scooping out the contents of a barn owl nest box last Friday, I’m a believer.

The nest box went up as a side-project two years ago, when I was contacted by Rick Wiltraut from the Pennsylvania DCNR.  Rick works with private landowners in PA on barn owl projects and wanted to reach across the river into northern NJ.  The owls are considered a Special Concern species in NJ, with populations trending downward across the region.  The Barn Owl Research Foundation (based in TX) has been monitoring many successful barn owl nest boxes down in Salem & Cumberland Cos for 30 years, but we’re not aware of any such efforts in the farmlands of north Jersey.  So we picked a few farms with good barn owl potential.  

Pat Hilton is always up for expanding her Ark, so her rolling farm in Readington was one that we chose.  We were all ecstatic when a nesting pair moved right in and reared 3 chicks in 2011.   In 2012, the owls got an earlier start (Pat discovered the first hatchlings on Earth Day – nice!).  Before we got a chance to clean out the nest box, the owls were back in business, incubating a second clutch by mid-July!

I spent last Friday catching up on some of the season’s odds & ends, and finally got over to Pat’s farm to clean out that nest box.  Holy puke balls, batgirl!  My little gardening spade and grocery bag were measly equipment for this job.  It took about 15 minutes to chisel through and remove the compacted pellets (regurgitated “undigestibles”) and droppings – two bags worth.  Almost every furry pellet I broke open contained two rodent skulls and the associated skeletons.  Those owls are some busy eaters indeed!

Barn Owl Pellet
Fur and bones – a barn owl pellet. Photo by MacKenzie Hall

Thinking ahead, it would be great to develop a formal barn owl nest box project in northern NJ, similar to what’s been done in south Jersey, and for American kestrels.  Barn owls are limited in part by suitable nest sites, so there’s plenty of room to make improvements for this farm-friendly bird.  Eagle Scouts and interns welcomed!

Oh – and if any biology students out there want to dissect the pellets and analyze the birds’ diet, I will happily bequeath the two bags to you.

Photos From the Field

Oystercatcher Technician shows diversity of tasks in wildlife conservation

By Alfred Breed, CWF Technician

My official job title with Conserve Wildlife Foundation of New Jersey is  “American Oystercatcher Technician”.  As such I am tasked during nesting season with monitoring Oystercatcher nesting sites, and during migratory season with locating flocks of Oystercatchers, counting them, resighting marked birds in each flock, recording data of field survey results and reporting our NJ counts and resights to a central database that holds data from the other reporting states in the migratory flyway.

As is usually the case in any job that has a “description”, the phrase “and other such tasks as assigned” is included as a catch-all for things that aren’t specifically listed in the description, but can be an important part of the duties of the position nonetheless. In my case these ancillary tasks are different each day, and often involve three of my favorite things: wildlife (of course!), science, and gear.  Working around my Oystercatcher surveys, which can only be conducted at high tide, I might be tasked to go to a location anywhere in the state and survey for a particular species of plant or animal; or to site select, construct, install, use, maintain, and troubleshoot various types of data collection or other equipment throughout South Jersey.

Trucks, trailers, boats and kayaks are the big-ticket items that I use every day, but I’m lucky enough to use a large variety of other cool tools and equipment as well. Driving is often a big part of my day, with travel times between sites eating up significant portions of the workday.  Sometimes I’m a wildlife EMT or ambulance driver, saving sick or injured animals from their immediate predicament and/or transporting them to various certified rehabilitation facilities located throughout the state.

Best of all is when I’m asked to assist visiting scientists or other conservation partners in their work, which can mean bio-sampling or banding.  Direct human/wildlife interaction is only appropriate when it is  for valid scientific or conservation management purposes, and is sanctioned and a permit issued by the appropriate governing body.  To be a staff member and so to be included in these sanctioned and permitted activities is a rare privilege indeed.

Each day is different, always interesting, occasionally exciting, and always personally rewarding as I play a small part in the management of threatened and endangered wildlife and the habitat that we share.

2012 is a Record year for nesting bald eagles in NJ.

NJ Bald Eagle population continues to increase.

by: Larissa Smith Wildlife Biologist/Volunteer Manager

Three chicks at the Kettle Creek nest © Alex Tongas

In 2012 a new record high of 135 eagle pairs were monitored during the nesting season. One hundred and nineteen of those were active which means they laid eggs.  A total of 165 young were produced this year and fledged (left the nest). That is 46 more than 2011’s 119 young produced.  Twenty-seven new eagle pairs were found this season, 15 in the south, 2 in central and 10 in northern NJ.  While all of these numbers are good news for NJ eagles they still need protection.  The two major threats that bald eagles in NJ face today are disturbance and habitat loss.

The NJ Bald Eagle Project has a dedicated group of volunteers who monitor nests throughout New Jersey.  They help to prevent disturbance at nest sites by educating the public about eagles.  The success of the eagle project is directly related to these wonderful volunteers.

Spruce Run Reservoir © A. W. Gumulak

More details on the 2012 nesting season will be available in the 2012 NJ Bald Eagle Project report.

 

 

Have You Seen This Bird?

LOOKING FOR HELP FROM BIRDWATCHERS TO FILL-IN DATA GAPS

By Michael Davenport, Marine Species & GIS Programs Manager

Young barn owls. Photo by MacKenzie Hall.

Conserve Wildlife Foundation staff work with the New Jersey Endangered and Nongame Species Program (ENSP) to manage and populate the state’s official database of rare wildlife, known as Biotics.  Currently, this database contains over 35,000 animal and plant records within New Jersey.  ENSP and CWF currently collect and enter data for the state’s 173 endangered, threatened, and special concern species.

There are several species of birds for which more observation data would be useful; and it’s likely that birdwatchers or other nature watchers may have the data needed.  Most good birdwatchers keep logs of what they’ve observed, when, and where.  It would be helpful if anyone with detailed observation data for the species listed at the end of this blog could submit their data for potential inclusion in the Biotics database.

To submit your observation data, please complete a Rare Wildlife Sighting Report Form.  The form is available on ENSP’s website for download as well as instructions for completing the form (a map must be attached when submitted).  In addition to the species listed below, please feel free to submit one or more forms for any of the state’s endangered, threatened, or special concern species.  A complete list of all of the species tracked by the state can be downloaded here.

If you have a large amount of data to submit, please contact Mike Davenport of Conserve Wildlife Foundation at (609) 292-3795 – alternative data submission options may be available (such as submitting Excel spreadsheets or GIS files).

Barn Owl (Tyto alba)
Nashville Warbler (Oreothlypis ruficapilla)
Saltmarsh Sparrow (Ammodramus caudacutus)
Sharp-shinned Hawk (Accipiter striatus)
Spotted Sandpiper (Actitis macularius)
Whimbrel (Numenius phaeopus)
Winter Wren (Troglodytes hiemalis)