Twenty-nine Shorebirds Stewards were posted at Delaware Bay beaches in Cumberland and Cape May Counties during the annual shorebird migration in May. Stewards help to protect the feeding shorebirds by keeping disturbance to a minimum. Shorebirds birds need to feed and fatten up on horseshoe crab eggs for their journey north to their breeding grounds. Stewards educate the public about this phenomenon and the reasons for the restricted beaches. The 2024 shorebird season went smoothly, the crabs spawned throughout May, so there were plenty of eggs on the beaches. This season the shorebirds were using many of the beaches with restricted access to the public. These beaches had stewards present and viewing areas, allowing people to witness the multitudes of shorebirds, especially the Red-knot, a federally listed species. Thank you to all the stewards for making this a successful shorebird season.
photos by Shorebird Stewards
photo by Dom ManaloShorebird Steward Susan Rashphoto by Susan Rashphoto by Luke Tanphoto by Luke Tanphoto by Susan RashShorebird Steward Neil Olfusen; photo by Dom Manalophoto by Susan Rashphoto by Luke TanCWF inter James O’Rourkephoto by Dom Manalophoto by Larissa SmithShorebird Steward Jill Connellphoto by Barb Bennettphoto by Barb Bennettphoto by Kat Codyphoto by Chris HeimerShorebird Stewards Dan & Cheryl Alexanderphoto by Barb Bennett
In the May 16th blog, Shorebird Stewards On the Bay in May, it’s mentioned that some beaches along the Delaware Bay have restricted access every year from May 7th to June 7th. This is due to the migratory shorebirds that travel thousands of miles and need a place to stop to feed. Our beaches contain excellent food sources to help birds gain weight to continue their journey- horseshoe crab eggs. They are filled with fat and protein. The Delaware Bay is the largest spawning area for horseshoe crabs in the world!
Now what do the Shorebird Stewards, such as myself, do all day? We monitor our assigned beaches and educate the public about this incredible phenomenon! My favorite beaches are Roosevelt Blvd. beach and Cook’s Beach because I see the most active flocks of shorebirds at these locations.
A group of the infamous Red Knots: Calidris canutus, Semipalmated Sandpipers: Calidrus pusilla, and Ruddy Turnstones: Arenaria interpres, at the beach on Roosevelt Blvd., photo: C. Franceschini
On a quiet day with not many people to educate, there are many things for us Stewards to do. Some Stewards read their books, watch movies, listen to music/podcasts, color/paint, take walks, research, etc. I do all of the above! Since we have a love for these special shorebirds, most Stewards also birdwatch! It’s a must to bring your binoculars or scope to observe these beautiful birds. Sometimes, you observe other interesting animals, too!
American Oystercatcher at Cook’s beach: Haematopus palliatus photo: C. FranceschiniBald Eagles, Haliaeetus leucocephalus, photo: C. Franceschini
Another activity to do in the down-time is to flip the spawning Atlantic Horseshoe crabs, Limulus polyphemus, back onto their legs so they can crawl back into the bay. When the tide rise, these crabs get overturned by the waves and have no way of returning back to their feet! Personally, this is my favorite activity to do. When you return after your “crab walk”, you get to see the tracks of their feet traveling back into the bay where they belong. Below on the left is a picture of flipped and rescued crabs: the one on the left is a male who decided to bury himself in the sand to preserve water until the tide comes back in, and the one on the right is a male who decided to make the trek back into the bay. When the tide comes in, the horseshoe crabs come up and begin spawning. Pictured below in the middle is an example of how crowded the beaches get with these creatures! On the right, is a photo of a tagged crab I found, and reported it to the US Fish and Wildlife Service so that they can collect data on the tagged crabs.
You can also get involved with helping these critters! “Return the Favor” is an organization dedicated to conducting beach walks to flip overturned horseshoe crabs on the NJ beaches of the Delaware Bay. You can join public walks that are held by walk leaders or sign up to be a volunteer and conduct your own walk (until July 15th, 2023 or next year). I am a volunteer and walk leader and it is one of my favorite things to do. Flipping horseshoe crabs is such a special event because that means you’re saving those crabs so they can continue to spawn and produce eggs for the shorebirds. With your help, you could help save hundreds of crabs just by flipping them over! Of course I had to capture this special moment of me flipping a crab (picture below)!
On these walks, you experience much more than just crabs. You get to see other wildlife that emerges during dusk or dawn. You can also go on the closed beaches to save the crabs that can’t be rescued during the day. During my walk, I got to see thousands of horseshoe crab eggs!
C. FranceschiniHorseshoe crab eggs photo: C. FranceschiniFemale horseshoe crab, photo: C. Franceschini
Since 2003 Conserve Wildlife Foundation has been coordinating the Delaware Bay Shorebird Stewards. Shorebird Stewards are posted at the beaches with restricted access during the shorebird season. This is done so that the shorebirds can feed undisturbed on horseshoe crab eggs. The beach restrictions are from May 7th to June 7th. The Delaware Bay is an important stopover for these birds on their way north to their breeding grounds. Stewards educate the public about the need for the beach restrictions. Once most people learn about the connection between the horseshoe crabs and shorebirds, they are more than happy to accept the restrictions. This season there were thirty-one stewards on 10 beaches in Cape May and Cumberland Counties. They are dedicated and on the beaches despite the weather, bugs and sometimes lack of shorebirds. Stewards are on beaches through Monday, so stop by and say “hello”.
Thank you Shorebird Stewards
Shorebirds on Thompson’s Beach, photo by: Matt Tribulski
Shorebirds along Delaware Bay: photo by Shorebird Steward Bob Bocci
May is wonderful time of year at the Delaware Bay. Horseshoe crabs are spawning and shorebirds stopping over on their migration to feed on the eggs. One of these shorebirds the red-knot, is a federally threatened species. Beaches along the Delaware Bay in New Jersey are extremely important stops in their migration. Many of these beaches have been restricted from May 7th to June 7th to allow the shorebirds to feed undisturbed. They need to gain enough weight to be able to fly non-stop to their breeding grounds in the artic.
photo by Shorebird Steward Dom Manalo
People come from all over to view this natural phenomenon and the Delaware bay is a popular tourist destination. It’s important to have Shorebird stewards on these restricted beaches to educate the public about the crabs and shorebirds. Shorebird stewards support beach restrictions by being present at closed beaches during shorebird season to ensure that resting and foraging shorebirds are not disturbed. This job includes educating beach visitors as to why the beaches are closed and the importance of the beaches to horseshoe crabs and migrating shorebirds.
Stewards are needed short term in May at beaches along the Delaware Bay in Cape May County from the Villas north to Reed’s Beach and beaches in Cumberland.
Please contact Larissa Smith at Larissa.Smith@conservewildlifenj.org for more details.
Congratulations to Luke Tan for having his photo Semipalmated Sandpipers Feeding win Runner Up in the Student Category for NJ Monthly’s Cover Search Competition. Luke volunteers as a CWF Shorebird Steward on the Delaware Bay during the spring shorebird migration. He captured this photo while on Reed’s Beach, Cape May County.
American oystercatcher foraging for oysters along the Delaware Bay. Photo credit: Meghan Kolk.
The Delaware Bay is well known for the spectacular phenomenon of spawning horseshoe crabs and migrating red knots every May, but in recent years the American oystercatchers (Haematopus palliatus) have also discovered the allure of the Bayshore and made it their home. American oystercatchers, a State Species of Special Concern, have been monitored and managed by CWF and the NJDFW’s Endangered and Non-game Species Program along the Atlantic coast beaches for nearly two decades, resulting in a steady population increase. However, the population that breeds along the Bayshore, first documented in 2016, has not received the same attention and had never been fully surveyed until this year.
CWF’s interest in this newly discovered population led to a small pilot study of a few known breeding pairs in 2018. Then this past May, we launched a bay-wide survey of the sandy beaches of the New Jersey side of the Bay from Cape May Point up to Seabreeze, the northernmost beach in Cumberland County. The purpose of the bay-wide survey is to determine a baseline of the number and distribution of breeding pairs along the Bayshore. The data gathered from this survey will add to the Statewide population estimate and help determine the amount of time and funding needed to fully monitor and manage the Bay’s population. More monitoring will be necessary to assess risk factors and reproductive success. Reproductive success can then be maximized by managing for risk factors such human disturbance, predation and tidal flooding.
This survey was made possible due to the efforts of dedicated volunteers and could not have been completed without their help. Unlike the Atlantic coast, the Bayshore beaches are often difficult to access, and many can only be reached by boat, making this survey more challenging. In fact, two sites that we planned to survey proved to be too difficult to reach and were skipped for this year. Each of the 33 remaining sites were surveyed just once within a specific timeframe, giving only a snapshot of the breeding season. We hope to be able to collect much more information in the future when more funding for this project is available. Based on the survey that was conducted, 13 pairs were documented at 8 different sites and 8 nests were documented at 5 different sites.
In addition to the formal survey, I was able to collect some observations as I spent every day in May on the Bay working with red knots. I took notice of the prey items that the oystercatchers were choosing. I often observed them feasting on oysters, which were plucked off exposed rubble at low tide. They also spent time at the man-made oyster reefs that were constructed at several beaches to act as breakwaters to slow the erosion of beaches. They also favored ribbed mussel beds, which become exposed as the tide recedes. The most interesting foraging behavior I witnessed was an oystercatcher plucking a fresh slipper shell off a horseshoe crab as it came to shore to spawn. It seems the Bay offers a variety of good food sources for a bird that mainly preys on bivalve mollusks.
I also noticed that flocks of up to 11 oystercatchers were traveling together up and down the Bayshore. This is a peculiar behavior since oystercatchers are highly territorial during the breeding season and are typically only seen in flocks once the breeding season is over. Could it be that the Bayshore is a popular spot for non-breeding young adults to hang out?
So much more research is needed to answer the many questions we have about the mysterious Bayshore oystercatchers.
There are many aspects to the Delaware Bay Shorebird Project. During the month of May researchers survey, re-sight and band shorebirds as well as conduct horseshoe crab egg counts. Nine beaches in Cape May and Cumberland Counties have restricted access during May, which allows the shorebirds to feed on the horseshoe crab eggs.
Shorebird Steward Bill Reinert@ Dom Manalo
Shorebird stewards are out on the beaches in all types of weather and insect seasons making sure that the restricted areas are respected. They do this through education and explaining to beach goers the importance of allowing shorebirds to have these undisturbed areas to feed. Stewards really make a big difference in shorebird protection on the bay and we thank them for all of their efforts this shorebird season. This season there were plenty of horseshoe crabs spawning with eggs in abundance, but unfortunately the shorebird numbers were down this season. For more details on the 2021 Shorebird season can be found in the article ,Red knot numbers plummet, pushing shorebird closer to extinction.
Conserve Wildlife Foundation’s Delaware Bay Shorebird Stewards will be on Restricted access beaches in Cape May and Cumberland Counties from May 15th through the 31st. We will be educating beach goers about the horseshoe crabs and shorebirds.
Plan a visit to the bay in May to witness this spectacular wildlife phenomena!
CBC Radio Canada program “The Current” interviewed Conserve Wildlife Foundation executive director David Wheeler for its feature on the fascinating story of New Jersey’s horseshoe crabs playing an irreplaceable role in the urgent search for an effective COVID-19 vaccine.
Conservationists are raising concerns that horseshoe crabs and the shorebirds that feed on them could become unexpected casualties of the COVID-19 pandemic.
“The milky blue blood of this ancient animal has made it into a modern medical marvel,” David Wheeler, executive director of the Conserve Wildlife Foundation of New Jersey, said of the horseshoe crab.
The medical industry captures the critters to draw out some of their blood, because it contains a unique component called limulus amebocyte lysate, or LAL. LAL can detect harmful toxins in vaccines — including those being produced for COVID-19 — or other medicine undergoing testing, he told The Current‘s Matt Galloway
“It’s really extraordinary,” said Wheeler. “The concern now, of course, is at some point we would really like to see it shift to a synthetic alternative rather than continuing to only use the crabs for that.”
Horseshoe crab blood is hypersensitive to dangerous bacteria that can develop in injectable medicines and vaccines.
In the race for a vaccine for COVID-19, horseshoe crabs – a New Jersey coastal fixture both now and eons ago in the days before the dinosaurs – may play a vital role.
This video story by ABC Action News features CWF Executive Director David Wheeler and top shorebird scientist Dr. Larry Niles in telling this science fiction-like tale.
