Banding and re-sighting birds is such a rewarding experience. You never know where and when a bird that you banded will show up and what you will learn from that encounter. Banding is a method for biologists to track migratory birds and gain valuable information about them through band re-sightings or encounters. Each year, around 10-20% of young ospreys that are documented during nest surveys in New Jersey are banded with USGS bird bands for future tracking. On Barnegat Bay, through Project RedBand, young ospreys are also banded with red auxiliary, or “field readable” bands. Since 2014, over 600 red bands have been deployed and in recent years we have had more re-sightings of birds that are alive as opposed to those that were found dead. In 2024, we identified 30 ospreys in New Jersey by their red bands.
In late 2024 we closed out our third year of comprehensive monitoring and management of nesting and migratory birds at Horseshoe Island. The recently formed island, situated just outside the southern edge of Little Egg Inlet, has quickly become one of the most important beach nesting bird sites in New Jersey.
Each year has presented new challenges and changes on the island and in 2024 there were a number of “firsts” to report. Piping plovers had previously utilized the island to rest and forage during both the migration and breeding seasons, this was the first year that they nested there. Adding any new nesting site for piping plovers in New Jersey is big news, adding three pairs was even more exciting. Although all three pairs hatched young, no chicks successfully fledged from the island, but we hope to build on that initial success next year.
Horseshoe Island is home to the northernmost royal tern colony in the hemisphere and the colony has grown in size each year. In 2024, CWF joined New Jersey Fish and Wildlife (NJFW) and The Wetlands Institute (TWI) to band royal tern chicks, the first time that royal terns have been banded in the state. With their newly minted blue field readable bands, we are now able to track movements and longevity of “our royals.” Under NJFW’s direction, adult piping plovers were also banded at Horseshoe for the first time this year. Lastly, led by TWI, black skimmer chicks were once again banded on the island.
Royal terns nesting at Horseshoe Island, the northernmost colony in the hemisphere. Photo credit: Emmy Casper
The island grew exponentially this year, it is now at least twice the size it was when monitoring began in 2021. The birds took advantage of the expanded habitat, upwards of 1400 state endangered black skimmers nested there in 2024, easily making it the largest skimmer colony in the state. And nearly 600 skimmer chicks fledged from the site, making it the most successful year to date for skimmers on Horseshoe Island. Large least and common tern colonies were also present. And American oystercatchers have increased from 6 to 16 breeding pairs since 2021; 2024 being the most productive year yet with 24 fledglings being recorded. Nearly every part of the island was in use, even more so if you factor in migratory and staging shorebirds that often crowd the tidal zones on the outer edges of the island and the interior lagoons for foraging.
Aerial view of Horseshoe Island in May 2024, looking east. Photo credit: Sam Galick
Monitoring and management of the island is done as a partnership between CWF, NJFW, and Edwin B. Forsythe National Wildlife Refuge. For more information about the island, read the recently released 2024 report.
In a landmark decision, the bald eagle and osprey have been removed from New Jersey’s endangered species list. This remarkable achievement is the result of decades of dedicated conservation efforts and collaboration between government agencies, environmental organizations like Conserve Wildlife Foundation, and the public. The recovery of these iconic birds demonstrates the power of focused conservation initiatives and habitat protection.
The bald eagle, once on the brink of extinction due to DDT use and habitat loss, has made an incredible comeback in New Jersey. From a single nesting pair in the 1970s, the state now boasts 293 nesting pairs. Similarly, ospreys have rebounded from just 50 nests in the 1970s to more than 800 today.
These success stories highlight the effectiveness of long-term conservation strategies, including habitat restoration, nest protection, and public education. They serve as inspiration for future conservation efforts and remind us of the positive impact we can have when we work together to protect our natural heritage.
Wildlife telemetry is a growing technological tool that uses tracking devices to help answer questions about animal movement patterns. For highly mobile and migratory species like shorebirds, telemetry is especially useful because it offers an opportunity to model migration routes, identify important staging or foraging sites, and learn about bird behavior. Since beginning a comprehensive American oystercatcher monitoring and banding program on the Delaware Bay in 2022, CWF and our partners have set out to learn as much as we can how oystercatchers move around the Bayshore and beyond so that we can apply this knowledge to management decisions. By banding oystercatcher adults and chicks over the last two seasons, we have been able to gain a basic understanding of oystercatcher movements around the Bayshore as well as some of their staging and wintering locations. However, there is only so much we can learn through band resights alone. For that reason, we were very excited to partner with The Wetlands Institute (TWI), Cape May Point Science Center (CMPSC), and Cellular Tracking Technologies (CTT) this past season to pioneer telemetry research for oystercatchers on the Bay.
Step 1: Choosing a Telemetry Method
Generally, wildlife telemetry can be divided into two camps: radio and GPS. Radio-tags work by emitting radio frequencies that are detected by radio towers or hand-held receiver devices when the tagged animal is within the detection range. Each transmitter emits a unique signal which allows the biologists to identify individuals. One big limitation of radio telemetry is that tags will only ping when in range of a radio tower (e.g., Motus towers) or handheld receiver, which means it relies on a widespread network of radio towers and/or biologists collecting data in the field. GPS telemetry, on the other hand, works by using satellite signals to pinpoint an individual’s exact location in real-time, similar to the way your cell phone locates your location on a navigation app. The units can store location data and then transfer information wirelessly through cellular networks right to an online portal on a phone or computer. Since this type of tracking does not require local radio towers, it can collect location data anywhere and at any time, which allows biologists to track both fine-scale and large-scale movement patterns. However, GPS transmitters are typically much heavier and more expensive than their radio-tag counterparts, which means this type of telemetry is limited by focal species and budget. While both methods have their advantages, we consulted with CTT to choose GPS units for our oystercatchers, and CMPSC generously provided the funding to purchase five transmitters for the Delaware Bay Oystercatcher project.
Overview of GPS telemetry: A tracking device is deployed onto the focal animal. The tracking device communicates with satellites at designated time intervals to calculate precise latitude and longitude positions. Location information is stored on the tracking device until it can be transmitted remotely through cellular networks to an online portal that can be accessed via phone or computer.
Step 2: Deploying the Transmitters
Once we chose the transmitter type, we had to design an attachment method. To our knowledge this is the first time GPS units have been deployed on oystercatchers in New Jersey, so we relied on the expertise of our colleagues working with oystercatchers in other states as well as CTT’s experts. In the end, we decided to use a “leg-loop harness” design based on recommendations from the American Oystercatcher Working Group. This method involves equipping the bird with a custom harness that fits close to its body, around its legs. The transmitter unit rests on the bird’s back so that the solar panels that power the battery are exposed to the sun. Fitting the harness is very precise work, and extra care is taken to make sure the harness is balanced and appropriately snug. Once deployed, the harness remains attached to the bird for the remainder of its life, although every effort is made to recapture the birds and remove transmitters that no longer function.
Oystercatchers are relatively large shorebirds, but we were not prepared for how challenging it was to find heavy birds on the Delaware Bay!
As you may expect, transmitter weight is a limiting factor when it comes to deploying units on lightweight animals like birds. The last thing we want to do is negatively impact the bird’s health and ability to fly. To prevent negative impacts to the birds, the combined weight of the harness and transmitter must not exceed 3% of the oystercatcher’s body weight. Since our set-ups were on the heavier side, averaging around 12-13 grams, we had to find oystercatchers heavy enough to carry them. Oystercatchers are relatively large shorebirds, but we were not prepared for how challenging it was to find heavy birds on the Delaware Bay! We captured around ten adults during the 2024 season, but only two birds met the mass criteria and were able to safely carry tracking units.
TWI’s Lisa Ferguson carefully fitting the leg loop harness on Roy Royster, an adult male oystercatcher. The harness is inspected for balance, placement, and tightness before being cut to size and stitched up for extra support. The transmitter unit (black rectangle) rests on the oystercatcher’s back so that its solar panels can be exposed to the sunlight. After deployment, the bird’s behavior and flight are monitored to ensure the bird is comfortable and unaffected by its new accessory.
Step 3: Tracking the Birds!
Given our challenges with deployment this season, we were very happy to successfully tag and track two birds, an adult female named Snowflower and an adult male named Roy Royster. Each bird has their own unique story representing different aspects of “oystercatcher life” during the nesting season and beyond. Although we are still in the early stages of collecting and analyzing transmitter data, we are excited to share some snapshots of their movements and behavior so far.
Snowflower:
Snowflower was tagged on May 7, 2024 at South Goshen Beach, while tending an active nest with her mate King Nummy. Unfortunately, the pair lost their nest to fox predation nine days later on May 16th, but we were still able to collect some interesting movement data before and after the nest was lost. While incubating the active nest, Snowflower stayed close to her nest territory, with occasional foraging trips to the oyster beds/living shorelines at Bay Cove Beach (Map 1). Following her nest loss, Snowflower’s range expanded significantly to encompass much more of the Bayshore, spanning from Del Haven all the way up to Egg Island – a distance of 15 to 23 miles depending on possible flight routes (Map 2)!We were also interested to observe that she continued to make foraging trips to living shorelines/oyster beds at Bay Cove and Rutger’s Cape Shore Laboratory. Up until very recently, Snowflower has remained on the Cape May Peninsula, especially around Atlantic Coast sites such as Stone Harbor Point, a known oystercatcher staging and wintering roost location (Map 3). However, she recently surprised us by taking a brief “vacation” all the way down to the Eastern Shore of Virginia from October 10-12, only to return to New Jersey on the 13th (Map 3)! It remains to be seen whether she will stay in New Jersey year-round or head to a more southern winter location.
Living shoreline oyster beds at Bay Cove Beach visited by Snowflower. Telemetry data, combined with field-based observations, can help us assess the value of such foraging habitats to oystercatchers.
Map 1: Snowflower stayed close to her nest territory at Goshen Beach while her nest was active. May 7 – May 16, 2024
Map 2: Following her nest loss, Snowflower expanded her range to include a large portion of Bayshore beaches including regular foraging trips to oyster beds in the region. May 16 – July 23, 2024.
Map 3: Snowflower’s staging locations after the nesting season. September 1-October 14, 2024. In addition to Delaware Bay sites, she is utilizing Atlantic Coast beaches and marshes known to host staging and wintering roots of oystercatchers. In a surprise trip, Snowflower flew down to the Eastern Shore of Virginia from October 10-12, but returned to the Stone Harbor/North Wildwood area on October 13th.
Roy Royster:
Compared to Snowflower’s transmitter deployment, Roy Royster’s story is filled with lots of ups and downs. After trying and failing to find oystercatchers heavy enough to carry transmitters, we were so ecstatic to finally deploy our second transmitter on Roy on June 28th near Dyers Cove in Cumberland County. This was especially exciting for the team because Roy had successfully hatched a nest and was in the process of brooding his chick (Rudy Royster) with mate Rhonda. Oystercatcher chicks depend on food provisions from their parents until they are at least 60 days old when their beaks become strong enough to pry open bivalves, their primary food source. Large feeding areas close to nesting locations have been linked to increased fledgling success (Nol 1989), presumably because adults foraging closer to their offspring can devote more time and energy to chick care and protection. Since only three nests managed to hatch during the 2024 season, we felt very lucky to be able to collect GPS data on a brooding pair to help test that hypothesis.
Unfortunately, Roy’s transmitter went silent almost immediately after deployment and didn’t transmit a single location after June 28th. We knew Roy was still alive and well based on field observations, but we couldn’t figure out why his transmitter wouldn’t work. After we had just about given up on receiving any data we were shocked when Roy’s transmitter finally checked in on September 11th, all the way from the Eastern Shore of Virginia! The transmitter also dumped hundreds of GPS locations stored before Roy left New Jersey, so we were able to map out some of his foraging patterns while brooding Rudy and after Rudy had fledged. While we don’t have fine-scale timing intervals, it seems like Roy stayed close to his brooding territory at South Dyers Cove (Map 4), potentially indicating the presence of abundant and high quality foraging resources. After Rudy fledged and was able to fly, Roy expanded his range, making trips to Money Island and Egg Island (Map 5). Roy’s migration data does have some gaps, so we can’t determine the exact route and timing of his migration south, but he continues to check in from Virginia (Map 6), coincidentally just a few miles from this year’s American Oystercatcher Working Group Meeting in Wachapreague. Sounds like the perfect opportunity for a field trip this December!
Map 4: Roy Royster remained close to his brooding territory while provisioning his chick. June 28-July 16, 2024.
Map 5: After Roy’s chick had fledged (July 16) and could forage more independently, Roy expanded his range to include further sites including Money Island and Egg Island. August 1-August 27, 2024
Map 6: In the fall, Roy Royster relocated to the Eastern Shore of Virginia, near Wachapreague. August 28-Sept 30, 2024.
Next Steps
We look forward to continued tracking and monitoring of Roy Royster and Snowflower throughout the winter and the next nesting season, but Roy and Snowflower represent just the beginning of our telemetry efforts on the Delaware Bay. We are already troubleshooting challenges encountered during our first season, and we are excited to improve and expand oystercatcher tracking in the years to come. Make sure to stay tuned for future updates on this exciting addition to our Delaware Bay American Oystercatcher project.
2024 Eagle Project Get-together; photo by: Kathy Clark
We can never thank the NJ Eagle Project volunteers enough for all they do to monitor and protect eagles in New Jersey. Conserve Wildlife Foundation hosted a get-together at the Assunpink Conservation Center this August as a way to say, “thank you”. There are 162 eagle project volunteers currently monitoring eagle nests statewide and it’s not always easy to get everyone together at one time due to distance and obligations. The volunteers who were able to attend shared stories with other volunteers about the nesting season, received an update on the proposed eagle delisting from ENSP Chief, Kathy Clark and hopefully felt very appreciated. This is down time for the eagle project volunteers, though some eagles are already back and working on their nests. THANK YOU to all the Eagle Project Volunteers.
photo by Don TorinoPhoto by Susan Harrisonphoto by Susan Harrison
The Bald Eagle project would not be possible without our corporate partners. We would like to thank PSE&G, Wakefern/ShopRite Stores, Wells Fargo Advisors, and the Cape May County Zoo (AAZK) for providing crucial financial and outreach resources to help keep bald eagles soaring above New Jersey.
An active osprey nest with two live and one dead nestling on the Mullica River. June 2024.
As juvenile ospreys fledge and adult females begin their southbound migration, work to summarize data from this year is ongoing. So far, it doesn’t look like a terrible year but not a great one either. Food stress (or brood reduction) was still apparent within some coastal nest colonies, despite the lack of severe weather (nor’easters/microbursts, etc) which could affect the ability of adult males to find and catch prey.
H54 final release, August 1st, 2024, photo by Rich Nicol
As any NJ Eagle Project nest monitor will tell you, we go through many emotions during the nesting season. The first time of the season that you spot the eagle pair on the nest is exhilarating because you know at least they are back. Then comes the “will they or won’t they nest stage”, where every time you go to the nest your heart drops if you don’t see the eagles. The feeling you get when they are sitting low in the nest and you know they have laid eggs is like your fist pumping the sky. However, there are times that seriously try you. There is nothing like the gut punch of seeing a nest tree that fell over after a storm or an abandoned nest sitting empty. We have to be even-keeled, but emotions boil over sometimes and the loss of a nest can really make you rethink why you are a nest monitor at all. The eagles you watch become family, and you feel great joy when the nestlings turn into fledglings and take to the skies, although you had no part in it, you feel pride nonetheless in their success. This brings us to this story of a rather precocious male nestling who defied all the odds.
For the past two summers, Victoria Rosikiewicz has worked for Conserve Wildlife Foundation of New Jersey at the Long Beach Island Foundation (LBIF) of Arts and Sciences. LBIF is a non-profit organization whose mission is to “promote the arts and sciences on Long Beach Island and the surrounding communities by enlightening, educating, and stimulating thought and discussion about current trends in the arts and sciences through educational and cultural programs for all ages.” We began working with LBIF in 2015 to help encourage ospreys to utilize a nest platform on their 20 acre preserved saltmarsh. Over the years, our relationship has grown and we have worked to improve science based programming and environmental features on site. From enhancing their Nature Trail and installing the live streaming LBIF Marsh Cam, building the Osprey Blind, and creating terrapin nesting habitat. Victoria has helped to expand environmental education through leading LBIF’s Discovery Days public walks, CWF’s wildlife summer camp, and conducting wildlife surveys. This work has been funded through a grant from the Osprey Foundation.
by CWF Great Bay Terrapin Project Volunteer Intern, Matthew McCall
CWF Volunteer Intern Matthew McCall holding two adult female terrapins.
This summer I had the opportunity to work as an intern for the Conserve Wildlife Foundation of New Jersey (CWF), researching and surveying Northern diamondback terrapins. Words could not describe how excited I was for this position, working with Senior Wildlife Biologist, Ben Wurst every day this summer was an incredible learning experience. Mr. Wurst taught me how to conduct surveys Great Bay Blvd Wildlife Management Area. This area is an ecological marvel, I witnessed hundreds of terrapins crossing the road on multiple occasions. I remember one day in particular when such a large quantity of terrapins were moving that it took me six hours to drive down that five-mile road, over two hundred terrapins were observed on Great Bay Boulevard that day alone.
by CWF Great Bay Terrapin Project Volunteer Intern, Madison Rose O’Malley
Madison holding an adult female terrapin with scars showing damage consistent with an impact with a boat/outboard.
This summer, I had the chance to volunteer for the Great Bay Terrapin Project to help survey the local terrapin population within Great Bay Boulevard Wildlife Management Area. Being able to assist a vulnerable population was incredibly fulfilling and I personally was able to learn a lot about their behavior during this incredible time. I got to see firsthand just how many female turtles crossed that road to lay their eggs, but unfortunately that also showed me just how many were injured or killed by reckless, inattentive, or outright malicious drivers. One thing I realized during this is just how hardy of an animal the terrapin is. I saw individuals with massive chunks taken out of them, bite marks, claw marks, and huge gashes from boat propellers forever etched into their shells. I realized that despite their vulnerability in early life and extremely slow growth, the defense of their shell and their insane ability to recover from injuries left them with very few threats for a long time. Even many major boat injuries are recoverable, emphasizing the severity of the threat posed by automobiles specifically.
