Category: Shorebirds

CWF’s Larry Niles is in Northern Canada searching for Red Knots and other shorebirds in their Arctic breeding territory. We are following him and posting summaries of his blog entries as he reports from the field.

 

While flying from Winnipeg to Nunavut, we focused on a strategy for finding red knot nests and adults with broods. We know from our 9 years of Arctic work that knots don’t occur randomly across the tundra landscape. Quite the opposite, they choose very specific places that distinguish knots from other Arctic nesting shorebirds.

 

Most knots choose to nest in relatively barren tundra slightly higher in elevation than more common Arctic nesting shorebirds. The latter prefer the lush wetland tundra along the coast and in the bigger river drainages because of the abundant prey early in the season. So why are knots drawn to colder and more barren places? We suspect they rely on the more persistent snow cover to discourage predation while they lie low in small patches of snow-free patches. Most predators prefer the lush areas with relatively dense shorebird nests. By the time the knot young hatch and are ready to feed, the protective snow barrier melts and the adults take their brood to the surrounding defrosted wetlands. By then shorebird prey are abundant.

 

So we suspect that at this point in the nesting season, we will find eggs just starting to hatch and soon the adults will lead their young to the nearby wetlands. Rick Lathrop, head of the Rutgers University Center for Remote Sensing and Spatial Analysis (CRSSA), has prepared mapping that will help us find prospective nest sites with the following characteristics:

1. Areas with less than 5% vegetation (We will especially be looking for eskers, or sinuous frost-cracked rocky ridges that snake through the best knots habitats.)
2. Numerous nearby patches of wetlands or small lakes with interconnecting streams
3. Areas of slightly higher elevation that stay snowy longer into the season

 

We have several targets but we are not certain that we can get to them. We hope to drive into the interior areas of Southampton on a new road built to help residents access new fishing sites. We want to take a truck as far as possible to carry our supplies and equipment. At the road end we will still have to move everything with ATVs to the areas of greatest probability, which are likely to be about 10-20 miles off the new road. It’s hard to plan.

 

But the rewards are great. If we are successful we will be able to study red knot for the first time without the need of being flown in to a remote place at great expense. We shall see.

 

For the original blog entry, see Larry’s post here.

Stay tuned for further updates!

CWF’s Larry Niles and his colleagues left yesterday on a three-week trip to Northern Canada to search for the nests of Red Knots and other shorebirds in their Arctic breeding territory. We’ll be following him and posting summaries of his blog entries as he reports from the field.

 

The odd thing about the shorebirds of Delaware Bay is that they are not really of Delaware Bay but of the Canadian Arctic. The most important part of their lives is spent in the barren high tundra of the Arctic, in places like Southampton Island, located on the north end of Hudson Bay. We have worked in Southampton Island for 6 years studying the red knot but stopped because the decline seen in Delaware Bay was more than apparent in the Arctic – birds literally disappeared from our study site.

 

It’s been 8 years since then, and now we are returning to begin new research on red knots. The first job of our small team (Larry Niles of the Conserve Wildlife Foundation of New Jersey, Mark Peck of the Royal Ontario Museum, Rick Lathrop of Rutgers University, Amanda Dey on vacation from NJ Division of Fish and Wildlife, and Steve Gates) will be to catch adult birds and attach geolocators, including a new type with a small radio transmitter to help relocate the bird next year. These small devices allow us to track birds around the globe. Our second job is to finish work started years ago on developing an Arctic-wide habitat map for red knots. These two projects are interrelated. Relocated knots help us determine the important places that define red knots habitat. We started this work in our first year.

In 2000, Mark Peck and I hatched a plan to search for knots with transmitters that we attached while the birds stopped over on Delaware Bay. We were foolish enough to think that we could follow the birds to the Arctic and relocate them from an airplane. We didn’t really grasp the odds of success. The transmitters had a range of 8 miles, and we would have to search an area the size of the eastern US. Our anxiety grew when we found that with the cost of renting a plane in the Arctic, we could afford only a few days of searching. As it turned out, we only needed one. Lucky for us, we flew Southampton Island and to our surprise found 8 birds with transmitters. We spent the rest of our time on the ground searching and eventually found the first nest of rufa knots.

 

Over the years our experience has grown but the knot population has shrunk, making them more difficult to find. Knots are tough to find anyway. They occur in very low densities (usually less than one per square kilometer) and the non-incubating adult doesn’t defend the territory, which is the usual clue that a shorebird is nesting nearby. Knots rarely nest where other shorebirds nest, choosing instead to lay eggs in barren tundra far from the coast. We hope to improve our chances this year by going later than normal and searching for adults with broods instead of nests.

 

For the full blog entry, see Larry’s post here.

Stay tuned for further updates!

 

together on the Delaware Bay

by Larissa Smith, Wildlife Biologist/Volunteer Coordinator

Once again migratory shorebirds, including the NJ endangered red knot, have returned to the Delaware Bay to feed on horseshoe crab eggs.  This annual phenomenon brings people from around the world to the Delaware Bay beaches.

Beaches are closed during the migration from May 7th through June 7th to protect the shorebirds from disturbance when feeding.  Just as the birds return each year so do volunteer Shorebird Stewards who educate the public about the beach closures , shorebirds and horseshoe crabs on nine beaches in Cape May and Cumberland County.  Now is a great to come out to the beaches to view shorebirds and crabs and say “hi” to the stewards.

This year the hot spots for shorebirds  in Cape May County  are Reed’s , Cook’s  and Kimble’s Beaches and  Fortescue in Cumberland County.

 

 

Surveying American Oystercatchers from the Sky

By Stephanie Egger, Wildlife Biologist

If you happened to be taking a stroll on a chilly February afternoon on the beaches of New Jersey and you saw a blue and white Cessna in the sky flying in a not-so-straight pattern, well that was me in the back of the teeny 4-seater plane.  Last Tuesday I helped complete the New Jersey segment of the American oystercatcher winter survey, which is being directed by Shiloh Schulte from the Manomet Center for Conservation Sciences, in partnership with the American Oystercatcher Working Group. Other staff from the Conserve Wildlife Foundation of New Jersey and the State’s Endangered and Nongame Species Program were on the beach (or in a boat) “ground-truthing” the survey in order to verify the data that were collected during the flight.

After swallowing a motion sickness pill as a precautionary measure (thanks Shiloh!) our four hour flight took off early afternoon from the Cape May County Airport, starting with a survey of Cape May Inlet.  We continued our flight north, surveying Hereford, Townsend’s, Corson’s, Great Egg Harbor, Absecon, Brigantine, Little Egg, Barnegat, and Manasquan Inlets and finally Sandy Hook Gateway National Recreation Area.  We saw flocks of wintering oystercatchers, from a handful to up to 140 birds, using sand and marsh habitats.  It was quite the first-time experience for me. Surveying from the air is NOT the easiest, but especially if a flock is seen at the last second and the plane has to bank hard. I admit I even glanced around for a sick bag a few times, but stayed strong! I don’t get seasick or airsick, but flying in a Cessna and doing numerous turns and banking was a whole new feeling.  There were many times all I could see from the backseat was water with no horizon to focus on, all while attempting to take good photographs of the flocks for the count. Try doing that when you are sideways!  In the end I managed to do really well at both, taking photos of the flocks and not getting sick during my aerial survey. Go me! Continue reading “Oystercatcher Project in Flight”

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.

Assessing the damage to coastal wildlife and their habitat

By Stephanie Egger, Wildlife Biologist

As we all know Hurricane Sandy caused severe damage and devastation to New Jersey residents, homes, and their businesses, but we must not forget that wildlife can also suffer from the impacts of a hurricane.  CWFNJ’s Beach Nesting Bird Project Manager, Todd Pover, Alfred Breed, CWFNJ Field Technician, and myself, conducted wildlife/habitat assessments on beaches from Brigantine to Cape May after the storm.  Our nesting sites further north in Ocean and Monmouth Counties were still not accessible at that time to evaluate.  We assessed nesting habitat for beach nesting bird species, especially Piping Plover as well beach/inlet habitat used by migratory shorebirds, particularly American Oystercatchers.

As expected, many of our nesting sites and sites that are also used by migratory shorebirds for roosting were hit hard by Hurricane Sandy, losing a great deal of sand and suitable habitat.  However, in some locations such as Stone Harbor Point and North Brigantine Natural Area, the storm scoured out areas with too much vegetation which is good for beach nesters as they prefer sparsely vegetated areas. Sand was also pushed back into the dunes to create blowouts and overwash areas that may serve as additional habitat.  Many of the areas seem to be very low lying now from the loss of sand and might be more flood prone which could impact the beach nesters in the spring.

We also observed migratory songbirds, golden-crowned kinglets, which were taking shelter and flittering through the back dune/bayberry habitat right after the storm.  This was a good reminder of the value of New Jersey coastal habitat for songbirds as they migrate down the coast.

As part of our assessment, we conducted American Oystercatcher surveys as a significant number use New Jersey beaches for roosting during the fall and winter.  Luckily, approximately 900-1,000 American Oystercatchers were still using our southern coastal inlets after Sandy, about the same number of birds observed the week before the storm.  Thanks to funding from the National Fish and Wildlife Foundation we were already conducting fall surveys for American Oystercatchers and in the position to compare their numbers before and after the storm.

Only time will tell if the habitat will build back up enough in time for the spring as the birds begin to arrive for the nesting season or if it will have lasting impacts on migratory bird species. We hope to conduct further assessments to gain a better understanding of the short- and long-term impacts to wildlife from Hurricane Sandy and how that may affect conservation and recovery effort for these species moving forward.

 

 

 

 

For CWFNJ’s videos of wildlife and habitat assessments click on the links below:

Wildlife Assessment Post Hurricane Sandy at North Brigantine Natural Area, NJ

Wildlife Assessment Post Hurricane Sandy at Stone Harbor Point, NJ

Wildlife Assessment Post Hurricane Sandy at Strathmere Natural Area, NJ

How to Make a Plover Biologist’s Day!

By Todd Pover, Beach Nesting Bird Project Manager

We spend a lot of time on the beach nesting bird project discussing the love/hate relationship the public has with piping plovers. For every person that supports our conservation efforts for this highly vulnerable shorebird, there seems to be at least two people that complain the plovers take up too much of the beach or prevent dogs from being allowed on the beach.

But every once in awhile, you have one of those perfect encounters that makes all the work worthwhile, so I thought I’d share a recent one with you.

Last week I was conducting a piping plover migration and band resighting survey at Stone Harbor Point. The fact that it was an extremely warm and sunny October day – extending the illusion of summer for just a wee bit longer – alone should have been enough to make me content. Then there was the very cooperative flock of 13 piping plovers, including three with color bands that I recognized as our summer breeders. All and all, it was shaping up as a good day in the field!

As I was almost wrapping up my survey I noticed a birdwatching couple a little further down the beach gazing off into the distance through a scope. On the off-chance they had noticed some plovers I had missed I approached them to see what they were looking at.

“Seeing anything interesting?” I inquired.

“A flock of royal and caspian terns, but no, nothing much really,” the man replied. And then out of the blue he added, “No piping plovers.”

This was a surprising comment since I hadn’t prompted him and October isn’t exactly prime time for piping plover viewing in New Jersey (or anywhere on the breeding grounds for that matter). I proceeded to strike up a conversation with the couple. It turned out they were from Holland, this was their first trip to the U.S., and they were on a birding/nature trip that was starting in the Cape May area.

We talked a little about the work I did and then, naturally, I mentioned to them that there actually was a group of piping plovers just 50 yards away from them on the beach. Given their pale sand color, even more so in non-breeding plumage, I wasn’t surprised the couple had walked right past the plovers.

The man’s eyes widened and he said, “Really?”

Of course, I led them back to the plovers. As we approached the plovers and they came into clear view, the man stopped and turned to me and said, “I have been dreaming of seeing a piping plover for years.”

It isn’t too often you get to make someone’s dream come true. And it is nice to know someone else is dreaming of plovers other than me.

LOOKING FOR HELP FROM BIRDWATCHERS TO FILL-IN DATA GAPS

By Michael Davenport, Marine Species & GIS Programs Manager

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)

How long have you been involved in the Delaware Bay?

I first censused shorebirds in Delaware Bay in the late 1970s as part of a project to determine how important Delaware Bay, Barnegat Bay, and Raritan Bay were to migrant shorebirds, and we discovered the masses of shorebirds foraging there. After that, birders flocked in masses to see the thousands of shorebirds using the bay. Well over 100,000 knots, and large numbers of other shorebirds regularly moved through the bay, and the numbers have declined since then.

How did you get interested in the region and its wildlife?

I have loved the shore and all the wildlife along it since coming to New Jersey. The whole Jersey shore teems with a wide diversity of birds, as well as other creatures. We have some of the largest and healthiest colonial waterbird colonies along the Atlantic Coast, and the Delaware Bay ecosystem is among the most enchanting and interesting ecosystems along the US East Coast. Once I came to Rutgers, I began studying birds along the Atlantic coast and along Delaware Bay. Since the shorebirds move through Delaware Bay in the early spring, I can study them there as well as the colonial nesting birds in Barnegat Bay.

Why should the shorebirds that move through Delaware Bay be protected?

The shorebirds that move through the bay each May and early June have migrated from a long distance, and have yet to fly to the Arctic to breed. These are long distances, and the ones that arrive from South America have depleted their body of all fat. Knots, for example, may weigh as little as 100 grams when they arrive, and have to nearly double their weight so that they can fly to the Arctic to breed. They not only have to reach the Arctic, but they need enough food resources (body fat) to lay eggs as there is little food when they first arrive.

Basically the shorebirds have 10 days to 2 weeks to nearly double their body weight. That is a lot of pressure, and they need safe places to roost at night, and to forage during the day.

 

What has the shorebird work shown us?

We have learned how important the Bay is to the survival of Red Knots, Sanderlings, Sempalmated Sandpipers, Turnstones, and others; how critical it is to protect the foraging shorebirds so they can gain weight; how long the flights of Red Knots are (in distance and in time); and our recent work with geolocators has even shown us how many knots can actually begin incubation once they reach the Arctic. The use of geolocators has allowed us to know where Red Knots are during their entire cycle, from Delaware Bay to the Arctic, from the Arctic to their wintering grounds (some going as far as Tierra del Fuego), to their return to Delaware Bay.

You work on laughing gulls – what should the reader know about these birds that makes them so interesting to you?

Laughing Gulls are native to New Jersey, and the breeding population in New Jersey is the largest along the Atlantic coast. Laughing Gull increased in the 1960s through the 1980s largely because open garbage dumps provided an easily accessible food supply, and young that might otherwise have starved after the breeding season, did not. Thus, the population slowly increased. But then there were massive efforts to control Laughing Gulls at Kennedy Airport, and thousands were killed. The combination of this effort, along with the closing of garbage dumps has resulted in a decline of Laughing Gulls in New Jersey.

While it may appear that Laughing Gulls are competing with the shorebirds for horseshoe crab eggs on Delaware Bay, the main problem is that when people (or dogs, boats) disrupt foraging shorebirds and gulls, the gulls can return more quickly than the shorebirds, and so they can displace the shorebirds from the best foraging places. It is thus very important to keep people and dogs off the shorebird foraging beaches when the shorebirds are present.

Why did you get involved with writing “Life Along the Delaware Bay?”

I feel very strongly that Delaware Bay is one of the East Coast’s Jewels. It needs to be understood and protected for both the natural ecosystem and for our human needs. The shorebirds, and the Delaware Bay ecosystem, can survive and do very well in the presence of people if we manage the Bay in a manner that is positive for both the ecosystem and people. The bay should flourish, allowing oystermen to farm their oysters, commercial fishermen to have sufficient fish stocks, for recreational fishermen to have good catches, for people to walk and swim, and for all of us to enjoy the Bay, while also allowing the natural ecosystem to flourish.

This will not happen, however, unless people love and appreciate the Bay. There are many many books on Chesapeake Bay, but none on Delaware Bay that takes the broad ecosystem approach that our book does. But more importantly, this is a wonderful and beautiful book that allows us all to appreciate and celebrate the bay.

The creation of the book was a joint effort among scientists, photographers, conservationists and environmentalists, commercial interests, and others who all hellped contribute pictures, ideas, writing, and the support to produce the book, and I am grateful for everyone’s support.

What would you like the reader of “Life Along the Delaware Bay” to learn about this important ecosystem?

That it is one of New Jersey’s truly wild and wonderful places. A place where recreational, commercial, and ecological interests can survive and flourish together. We must preserve it for generations of children, as well as the generations of crabs, fish, and birds that live there.

 

“Life Along the Delaware Bay” can be purchased through CWF’s online store.

 

by: Larissa Smith Wildlife Biologist/Volunteer Manager

Horseshoe crabs have been spawning since early May along Delaware Bay beaches.  This is good news for the shorebirds that have been coming to fill up on the eggs before their long flights.  Researchers have reported that the birds have been gaining the weight needed for their flights and a group of  birds have already left the area.