Parting is Such Sweet Sorrow

Wrapping up the 2015 Piping Plover Chick Mortality Study

by Emily Heiser, Biological Assistant

Look closely - a piping plover egg showing signs of hatching.
Look closely – a piping plover egg showing signs of hatching.

The tail end of the breeding season always brings a mix of unsettled emotions. There is a German word that perfectly describes this feeling, zugunhrue. It’s a compound word: ‘Zug’, describes movement or migration and ‘Unhrue’, describes anxiety or restlessness. You can almost see this feeling dripping off of the birds as they move around, fighting over the best foraging spots to bulk up and snuggling up to one another in the perfect roosting spot. They rely on weather cues and dwindling daylight to determine the best time to depart. To some extent, we find ourselves doing the same. It is a significant changing of the seasons as summer fades into fall for the beach nesting bird staff. We pack up the equipment, take down fencing, polish data and shift mindsets from breeding to migration.

Michelle Stantial of SUNY-ESF and Emily Heiser of CWF after their last successful chick capture of the 2015 field season (Photo courtesy of Northside Jim)
Michelle Stantial of SUNY-ESF and Emily Heiser of CWF after their last successful chick capture of the 2015 field season (Photo courtesy of Northside Jim)

Michelle Stantial, of the State University of New York – College of Environmental Science and Forestry departed on her own migration last week, wrapping up the 2015 piping plover chick mortality study. Michelle and I had a whirlwind summer of traversing the coast, trapping birds, collecting data and finding time to sleep somewhere in between. Ironically, New Jersey bolstered one of its better productivity seasons in years during the chick mortality study! Overall, the study was a resounding success. We worked with wonderful partners to achieve optimal results and hope to move ahead with future seasons. In total, we collected information from 29 breeding pairs of piping plovers and 62 of their chicks, deployed nine nest cameras and hiked many miles of beach looking for predator signs.

CWF beach nesting bird crew at Edwin B. Forsythe National Wildlife Refuge release piping plover chicks after being weighed and measured.
CWF beach nesting bird crew at Edwin B. Forsythe National Wildlife Refuge release piping plover chicks after being weighed and measured.

This season had all sorts of surprises waiting for us. While we took our losses hard, we celebrated our victories even harder. The information from the nest cameras was vital in our efforts to identify predators and in sourcing the issues that piping plovers face here in New Jersey. We watched fox, crow, gull and mink eat nests and it broke our hearts along the way. On the other hand, we watched how determined these birds were in sitting on their nests through downpours, lightning storms, high winds and tides. We had not one, but TWO double clutches this season. A double clutch is a rare event in a piping plover’s life cycle and has been documented sparingly over the years along the entire Atlantic Coast. The two pairs that double clutched laid their first nests, successfully reared their chicks to fledge and then laid another nest, ultimately fledging those chicks as well! It was a true delight to watch all four of these broods succeed this season.

 

As the weeks pass, the number of migrating piping plovers slowly dwindles and our seasonal staff departs for new adventures. It is always a bit sad to watch them leave, but it is reassuring to know we have made life long friendships and that the birds will undoubtedly be back next season! We only have to get through the doldrums of winter. Enjoy the fall and good luck on migration, our fine-feathered friends!

 

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Emily Heiser is a Biological Assistant for the Conserve Wildlife Foundation of New Jersey.

The Pitter-Patter of Tiny Plover Feet!

An update on the 2015 Piping Plover Chick Mortality study

By: Emily Heiser, Biological Assistant

 

Summer is once again flying by and we find ourselves more than halfway through the beach nesting bird season. New Jersey’s piping plovers are almost done incubating their nests and most already have chicks running around!

 

Two and a half week old piping plover chick, in hand for mid development "check-up" on weight and wing growth.
Two and a half week old piping plover chick, in hand for mid development “check-up” on weight and wing growth.

I would argue that there is nothing cuter than a piping plover chick. Covered in downy feathers, they simply look like little cotton balls with toothpicks for legs. Piping plover chicks are precocial, which means they hatch in an advanced state and are able to feed themselves almost immediately. The adults stay with their young to protect them from predators until they are able to fly, which takes about 25-35 days.

 

New Jersey plovers have a very difficult time getting their chicks to that 25-day mark. Unfortunately, chicks perish for various reasons. Determining the causes of chick loss in is the main driver behind the New Jersey piping plover chick mortality study being conducted by the State University of New York – College of Environmental Science and Forestry this year.

 

Just hatched piping plover chicks sporting their color bands, which will help researchers track them.
Just hatched piping plover chicks sporting their color bands, which will help researchers track them.

 

 

 

 

Michelle Stantial and I have been visiting sites up and down the coast to check on the status of the study broods. To date, we have been able to band 46 chicks from 14 different broods.

 

The small color bands that we place on the upper legs of the chicks help us to identify each chick as an individual and also helps us know which individual was lost. Every five to seven days we recapture the chicks to weigh and measure them. We hope to correlate chick growth to habitat quality and likelihood of survival. Some exciting preliminary observations have already been made between the sites!

 

Plover chicks all hatch at around the same weight. During incubation, the embryo gets all of its food from an egg sac. The chicks weigh around six to seven grams when they hatch. Over the next five days, growth rates begin to spike.

CWF Biological Assistant Emily Heiser places newly hatched piping plover chicks back into nest bowl after banding.
CWF Biological Assistant Emily Heiser places newly hatched piping plover chicks back into nest bowl after banding.

 

By simply looking at some of the chick weights, you can determine where foraging quality is likely going to be greatest. Lower weights could also be attributed to human disturbance levels. Chicks disturbed on a regular basis, may not be able to spend as much time foraging as chicks that are not disturbed as often.

 

One of the true highlights of this season has been overseeing so many chicks across all of our study sites! Twenty-seven of our study chicks have made it to fledge so far. There is nothing quite so satisfying as watching them spread their wings for the first time. It never ceases to bring a smile to my face as their tiny feet pitter-patter across the sand (and my heart), their perfect wings open up, and suddenly…lift off!

 

There is still some time left in the season for some more tiny miracles to happen on our beaches, so keep your fingers crossed and send them lots of luck as they finish up their breeding season here in New Jersey!

 

Learn more:

 

Emily Heiser is the Biological Assistant for Conserve Wildlife Foundation of New Jersey.

 

Pondering the Plovers

Researching the Causes of Chick Loss in Piping Plovers

By: Emily Heiser, Biological Assistant

Double the fun! We were able to capture both birds in one try at this nest!
Double the fun! We were able to capture both birds in one try at this nest!

I often find myself contemplating the lives of Piping Plovers. What happened to that nest? Why did they choose that exact spot to lay their eggs? Why did those chicks disappear? Where will they go for the winter? As wildlife biologists and conservationists who spend hours and hours each summer watching them, we tend to question every aspect of the Piping Plover’s life cycle. These questions also push us to work harder and do more for this species, which is so imperiled throughout its range.

 

This summer, thanks to the extraordinary support of the US Fish and Wildlife Service, the New Jersey Division of Fish and Wildlife, and along with the blessings of Conserve Wildlife Foundations’s own Beach Nesting Bird Project Manager Todd Pover, the State University of New York College of Environmental Science and Forestry (SUNY-ESF) received the green light to proceed with a chick mortality study of Piping Plovers along New Jersey’s coast.

 

Funded by the National Fish and Wildlife Foundation, SUNY-ESF’s Jonathan Cohen and Michelle Stantial have teamed up once again to make some plover magic happen here in New Jersey. Having had the great privilege of working for this dynamic duo in the past, I am over the moon to be able to assist them once again.

 

Nest camera being readied so it can keep a watchful eye on the nest for predators at all times.
Nest camera being readied so it can keep a watchful eye on the nest for predators at all times.

The big question of this study is simple on the surface: what are the causes of chick mortality? The methods of finding those answers are much more complex. On April 15th, we kicked off another fantastic field season collecting data from Barnegat Light to Cape May. In order to determine the causes of chick loss we first need to locate nests, determine nest fate, track the adults, and then finally track the chicks. We hit the ground running and so far there are 26 active nests between all of our study sites! One of the most interesting parts of this study pertains to the cameras we are placing at a number of nests.

 

Our high tech plovers are now enjoying a 24/7 monitor that never bothers them, but is always watching. On more occasions than I can count, I have come across a nest that was lost in the past 10-24 hours.

 

We make our best guess as to what happened based on the evidence…Was it a flood? An avian predator? A mammalian predator? What happened?! It’s frustrating, but now we can know with certainty and we can learn much more about the threats Piping Plovers face on their breeding grounds.

A male piping plover in "holding pen" awaiting his debut sporting his new bands and transmitter to be used for tracking.
A male piping plover in “holding pen” awaiting his debut sporting his new bands and transmitter to be used for tracking.

 

Another important component of this project revolves around the banding and nano-tagging the adults. It is essential to the study that we are able to determine survival and movement of the adults. So far we have been able to band 24 adults, with 10 of those also receiving a transmitter. There are two telemetry towers between our study sites. These towers are able to pick up multiple radio-tagged birds and track of them day and night.

 

Interestingly, in a previous study developed by SUNY-ESF adult female Piping Plovers spent much of the evening away from the nest and leave the males to do all of the nocturnal incubating! The most advantageous part of these towers will, in theory, be able to tell us what happens to the chicks. Each chick will receive a tiny transmitter and as depressing as it may seem, those towers can tell us the speed and trajectory a chick was carried away from the site by a predator.

 

My vote was to give the chicks an iPhone and shoot me a text when they were in danger, but that doesn’t seem to be possible…yet.

 

I am not sure there will ever come a day when I am not pondering the lives of Piping Plovers, but I believe that science and research will continue to supply more answers. I believe that this particular study will contribute to a greater understanding of these birds, and on a personal level, I believe it will enable me to become a better steward and manager of all New Jersey’s beach nesting birds.

 

We look forward to bringing spectacular photos and updates whenever we can, so stayed tuned for more pondering of plovers!

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Emily Heiser is the Biological Assistant for Conserve Wildlife Foundation of New Jersey.

 

PIPING PLOVER BAND RESIGHTING IN NEW JERSEY

A new window into our plover world

By Todd Pover, Beach Nesting Bird Project Manager

Banded Piping Plover at Stone Harbor Point, NJ. Courtesy of Tom Reed
Banded Piping Plover at Stone Harbor Point, NJ.
Courtesy of Tom Reed

On the beach nesting bird project we are normally busy this time of the year locating nests, putting up fence to protect nesting areas, and placing special predator cages around piping plover nests. This year we have added a new wrinkle – we are also conducting intensive piping plover band re-sighting surveys.

Those surveys are possible as a result of a research project being conducted in New Jersey (and Massachusetts) by the State University of New York – College of Environmental Science and Forestry on piping plover flight behaviors and patterns. About 30 plovers were colored banded here last year with more planned this season as part of the study. This has provided an exciting opportunity for us to answer some questions of our own that are not part of the research project itself, so the Conserve Wildlife Foundation of New Jersey and the state’s Endangered and Nongame Species Program have teamed up to do near daily band re-sightings this spring and last fall. Continue reading “PIPING PLOVER BAND RESIGHTING IN NEW JERSEY”