Conserve Wildlife Blog

Archive for the ‘Birds’ Category

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.

Photos From the Field

Monday, December 3rd, 2012
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.

Friday, October 5th, 2012

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?

Monday, October 1st, 2012
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)

A year in the life of a juvenile eagle…

Monday, August 6th, 2012

Male eagle with transmitter sighted June 28, 2012 at Spruce Run Reservoir, NJ © William Gumulak

Update on tracking NJ eagles

by Larissa Smith, Wildlife Biologist/Volunteer Manager

In June of 2011 two chicks (male & female) from the Merrill Creek Reservoir eagle nest in Warren County were fitted with solar-powered transmitters that are monitored via satellites. The males movements have been tracked for over a year starting when he left the nest in June.  You can see the eagles movements by going to: http://www.merrillcreek.com/eagletracking.html  In September the male flew as far West as Harrisburg, PA and in January spent a few days at the upper Chesapeake Bay in Maryland.  He has spent the majority of his time in New Jersey and Eastern Pennsylvania. It is very interesting to see where the eagle is spending his time and the type of habitat he is using.  When you go to the map you can zoom in to get a close up look at his locations.

Unfortunately the female chick died in October due to starvation. She tested positive for West Nile Virus which could have contributed to her death.  The transmitter was recovered from the female and in May of this year the transmitter was placed on the largest of three chicks, a female, in the Merrill Creek nest.  She just recently left the nest and is still in the area of the nest taking short flights. To follow her movements go to http://www.merrillcreek.com/eagletracking.html

 

Female eagle with transmitter placed May 29, 2012 © Kathy Clark