Arctic Whimbrels

Shiloh Schulte, Manomet’s senior shorebird scientist, recently spent four weeks in the Arctic National Wildlife Refuge, continuing several studies delayed by COVID-19. Working closely with the U.S Fish and Wildlife Service, Shiloh deployed GPS tracking tags on Whimbrel, American Golden-Plovers, Pectoral Sandpipers, and other species as part of an ongoing study of local movement patterns and long-distance migration pathways and stopover sites. In addition to the tracking work, Shiloh collaborated to develop methods for remote monitoring of shorebird nests and mentored new USFWS technicians and volunteers.

Shiloh recently shared his experiences on Alaska’s Katakturuk River tagging Whimbrels to study local movement patterns and long-distance migration pathways and stopover sites.

I have been lying flat in the sedge, hiding behind a tundra mound for the last 20 minutes. A cloud of frustrated mosquitos is whining all around but unable to reach me through my bug shirt and headnet. One hundred and fifty meters away, a male Whimbrel is slowly making his way back toward his nest, head up and on high alert. It is the morning of June 23, and it’s our last morning in the Katakturuk River valley in Alaska’s Arctic National Wildlife Refuge. Our trip has already been a huge success, with five Whimbrels tagged with GPS transmitters in the last three days. But, we have one last transmitter to put out, and we really want to catch this bird. Two hundred meters along the slope, I can barely see the tan camouflage of Kirsti Carr’s bug jacket as she also lies flat in the sedge, watching from another angle and ready to radio the moment the Whimbrel gets back on the nest.

A Whimbrel watches us as we search for her nest in the tall tundra sedge.

A Whimbrel watches us as we search for her nest in the tall tundra sedge.

Kirsti and I arrived in the Katakturuk Valley on June 20 to find any Whimbrel nests in the area and hoping to catch up to six adults for tagging. Kirsti is a volunteer for the U.S. Fish and Wildlife Service (USFWS) and working with me to catch and tag sandpipers because of her previous experience GPS tagging Red-headed Woodpeckers in Minnesota. The Katakturuk is about 35km to the Southeast of the USFWS Canning River Delta Camp, which is only about 25 minutes away by helicopter. Eric Lane, our pilot from Pollux Aviation, dropped us off and even helped set up our spike camp before heading out.

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Kirsti Carr and Shiloh Schulte search for Whimbrel and American Golden-Plover nests in the Katakturuk River Valley in the Arctic National Wildlife Refuge.

Kirsti Carr and Shiloh Schulte search for Whimbrel and American Golden-Plover nests in the Katakturuk River Valley in the Arctic National Wildlife Refuge.

The Katakturuk River valley is a patchwork of dry tundra covered in Dryas flowers and lichen and hummock wetlands dominated by a mix of sedge species. After a couple of weeks of daily walking on the wet, uneven ground of the Canning River Delta, the good footing and stunning landscape were a welcome change. The last time I was here was in June 2019. Manomet and the USFWS had a small joint camp in the Katakturuk Valley that year. We conducted Program for Regional and International Shorebird Monitoring surveys (PRISM) for breeding shorebirds; estimated shorebird nest survival across the Arctic coastal plain; and deployed tags on Pectoral Sandpipers and American Golden-Plovers to assess their use of the coastal plain and migration pathways and strategies. 2020 was supposed to be the second year of all of these projects, but like so many other things, COVID shut those plans down at least temporarily. We had hoped to resume fieldwork in 2021, but we again had to postpone most of the work with the uncertainty around COVID rules and vaccine availability. Fortunately, I was able to get vaccinated in time to join the USFWS team going to the Canning River Delta camp in June. My goal was to deploy transmitters on Pectoral Sandpipers, American Golden-Plovers, and Whimbrel, and assist the USFWS team with their work at the Canning River camp.

Kirsti Carr opens the wing of a captured Whimbrel so we can document molt and feather condition

Kirsti Carr opens the wing of a captured Whimbrel so we can document molt and feather condition

A Whimbrel fitted with a GPS tag that will allow us to track its migration and habitat use over several years.

A Whimbrel fitted with a GPS tag that will allow us to track its migration and habitat use over several years.

Back in 2019, the Katakturuk Valley held several surprises for us. We discovered a high density of nesting Whimbrel in the area, which led to questions about the importance of the Refuge coastal plain for this species. We were curious to learn if these birds were part of the Mackenzie Delta group that migrates east and crosses the Atlantic to South America, or if they were associated with the rest of the Whimbrel in Alaska, which migrates down the west coast. In 2019, we tagged one bird with a GPS transmitter and discovered that he went the Eastern route and ended up in Brazil by way of the Hudson Bay flats and an impressive multi-day flight over the Atlantic Ocean. This year, we hoped to expand the project with six new GPS tags that would track the Whimbrels over multiple years.

Watching through my binoculars over the top of the mound, I see the Whimbrel dip out of sight very close to the nest and not reappear. After a couple of moments, I radio to Kirsti:

“Can you still see him?”

“No, he just dropped out of sight, but I think he is on the nest.”

This Whimbrel had opinions about our presence in her territory. Whimbrels are highly defensive of their nests and territories and will harass predators and battle with their neighbors.

This Whimbrel had opinions about our presence in her territory. Whimbrels are highly defensive of their nests and territories and will harass predators and battle with their neighbors.

I wait several more moments before seeing a slight movement through the sedge as the bird turns his head. He is definitely on the nest now. Holding my breath, I give a hard pull on the trigger line and then immediately start sprinting toward the nest. The traps are very reliable, but there is a chance the bird can escape given enough time. Whimbrel are so wary that we have to hide quite a distance from the nest. Speed is of the essence. Hurdling mounds and avoiding mud pits, I somehow make it to the trap without falling on my face. Bird in the trap!

Moments later we add a USGS metal band with a unique code and then complete a series of measurements to confirm sex and assess molt and body condition. Next, we add a field readable leg flag (EY5) and a solar-powered GPS transmitter that should last several years and allow us to track this bird through his incredible annual journey.

Senior Scientist, Shiloh Schulte prepares to release a GPS-tagged Whimbrel

Senior Scientist, Shiloh Schulte prepares to release a GPS-tagged Whimbrel

After a final check, EY5 is ready for release. He launches into the air with a hard beat of his wings, rising up and out towards the river, giving a loud alarm call. His mate has been standing nearby and leaps up to follow. We quickly gather our supplies and move out of the area so they can return to their nest as quickly as possible. Elated with the morning’s work, we head back to camp to finish packing and wait for the helicopter to pick us up. In three and a half days, we found three nesting Whimbrel pairs and one pair of American Golden-Plovers and managed to catch all eight birds and fit them with GPS tags. When we return to the Canning Camp, we will complete the tagging work for the season with 13 tags on female Pectoral Sandpipers. We will track all these birds through the fall and winter, and these Whimbrel tags should keep providing valuable data for several years.

 

A recently tagged Whimbrel in flight

A recently tagged Whimbrel in flight

 

 

Sleep is optional in the land of the Midnight Sun

All photos by Shiloh Schulte unless otherwise noted.

Late night fog and sun at camp.

Late-night fog and sun at camp.

I am writing this post on the flight home. It’s been a crazy day so far. After staying in camp a couple of days longer than planned because of weather challenges, Nick was able to come in from Kavik this morning with the R44 helicopter and bring me to the Prudhoe Bay Airport. From there, I was able to get on a flight to Anchorage via Utqiagvik (Barrow) and Fairbanks. From Anchorage, I am heading to Seattle and then Boston and then home! Should be about 24 hours from my tent to my front door if all goes well.

The view from my front door in the Katakturuk camp.

The view from my front door in the Katakturuk camp.

Lindall Kidd and Jordan Muir ready to take on the day.

Lindall Kidd and Jordan Muir ready to take on the day.

The last two weeks have been intense. After concluding the PRISM shorebird surveys, we switched immediately to working on a study of shorebird nest survival in the Western coastal plain of the Arctic National Wildlife Refuge. We are trying to map variation in nest survival from the foothills to the coast and identify highly productive areas. To do this we first had to find the nests which, as Stephen described in an earlier post, are incredibly well camouflaged in this environment. Each morning, teams of two head out via helicopter to pre-selected random points on the coastal plain and spend up to four hours searching that area for nesting shorebirds and waterfowl. We then move to another point and do it again, trying to find as many nests as possible each day. With three teams in the field, the logistics get challenging, even with a helicopter and a great pilot. Fog can roll in off the ocean at any time and foil our plans in a hurry.

A male Red Phalarope broods his chicks. Male phalaropes are responsible for incubating the eggs and caring for the chicks. Female Red Phalaropes sometimes lay multiple clutches with different males and do not raise the young.

A male Red Phalarope broods his chicks. Male phalaropes are responsible for incubating the eggs and caring for the chicks. Female Red Phalaropes sometimes lay multiple clutches with different males and do not raise the young.

A baby Red Phalarope hiding in the sedge.

A baby Red Phalarope hiding in the sedge.

We lucked out on the weather for the most part during this project, but as a result, we ran into some other difficulties. The exceptionally warm weather and early spring in the Alaskan Arctic meant the birds all started nesting early. By the time we started searching some nests were already hatching when normally they would just be starting incubation. As soon as we began it was a race against time to find as many nests as possible before they hatched. Shorebird nest searching requires a combination of endurance and patience. Sometimes the best strategy is just to hike systematically for hours and eventually you will flush a bird off a nest. At other times you need to carefully read a bird’s behavior to determine if it has a nest and then where to wait to observe the bird so you can find the nest. Too close and the bird will become agitated and refuse to go back to the nest. Too far away and you will lose sight of it in the grass and sedge. If you are wrong about the behavior you can spend a long time watching a bird that does not have a nest, which wastes valuable time. Each species has a different strategy for hiding their nest and foiling nest predators. When we find a nest we record the species and the age of the nest, then add a tiny sensor that will record the temperature of the nest every few minutes. After the nesting season is over we can go back and collect all these sensors and use the temperature data to identify whether each nest hatched or failed. At some nests, we are also placing game cameras to identify nest predators.

Shiloh Schulte deploys a nest camera. Photo by Jordan Muir.

Shiloh Schulte deploys a nest camera. Photo by Jordan Muir.

In addition to the nest survival study, we are deploying GPS tags on several shorebird species to continue a project tracking post-breeding movement, habitat use, and migration patterns. To catch a shorebird we first need to find the nest and then set up a net trap. All of the nesting birds in the tagging study have to be separate from the nest survival study, so this means another round of nest searching and then banding in the evening after 8-10 hours in the field earlier in the day. With 24 hour daylight, we can keep working as long as we need to, so this makes for some long but deeply rewarding days.

With a bird in the hand, we first attach a leg band, then take a series of standard measurements to assess health, age, and sex of the bird. Finally, we slip on a harness with a GPS tag attached. The total weight of the tag and bands has to be less than 3% of the bird’s body weight to avoid impacting the flight ability or behavior of the bird. The tags are programmed to start recording in late June, and we should start getting weekly updates on their locations in July. At the Katakturuk camp, we tagged six Pectoral Sandpipers, five American Golden-Plovers, and one Whimbrel.

Lindall Kidd and Rick Lanctot finish banding and tagging an American Golden-Plover.

Lindall Kidd and Rick Lanctot finish banding and tagging an American Golden-Plover.

Shiloh Schulte releases a tagged American Golden-Plover. Photo by Metta McGarvey.

Shiloh Schulte releases a tagged American Golden-Plover. Photo by Metta McGarvey.

A GPS-tagged Red Phalarope coming in for landing. These birds spend the winter on the open Pacific Ocean, but their migration routes and exact wintering areas remain a mystery. Hopefully this study will help resolve that.

A GPS-tagged Red Phalarope coming in for landing. These birds spend the winter on the open Pacific Ocean, but their migration routes and exact wintering areas remain a mystery. Hopefully this study will help resolve that.

All too soon, the work at the Katakturuk Camp was over and the rest of the crew dispersed back to their lives outside of the Arctic. I moved over to the Canning River camp where I worked last year and spent the next week helping the Fish and Wildlife Service crew with their work and deploying GPS tags on Red Phalaropes. Red Phalaropes nest in large wetlands and are not found in the uplands near the Katakturuk camp. At the Canning, I also had the opportunity to help a little on a study of Arctic Foxes. On my last night in camp, I hiked down to a fox den a few miles away to swap out camera cards on the game cameras at the den. It was a perfect Arctic night with stunning golden light and still air so I could see and hear for miles. I only saw the kits from a distance but both parents were there and watched me closely when I was near the den but settled down quickly as soon as I moved off.

Arctic Fox lounging near his den.

Arctic Fox lounging near his den.

I feel incredibly lucky to have the opportunity to work with a top-notch team in one of the last wild places in the country. The Arctic Refuge is stunning and intimidating and absolutely essential to a whole range of species from lichen and flowers to migratory shorebirds to seals and whales and bears. I am very excited to be almost home to see my family, but already looking forward to my next trip North.

Golden light of midnight over the Canning River.

Golden light of midnight over the Canning River.

 

 

 

The Camp at the Katakturuk River

Our field camp this year is nestled in a small valley in the foothills of the Brooks Range alongside the Katakturuk River in the Arctic National Wildlife Refuge. The Katakturuk is a small river running about 30 miles from its headwaters in the Brooks to the Arctic Ocean. This area is much drier than the coastal wetlands where I normally work, with hills on both sides of the river and dry upland lichen tundra all around. This field site is a strong contender for the most beautiful site I have ever worked in. Herds of caribou wander through the valley every day against the backdrop of stunning mountains. The valley floor is carpeted with Dryas, Arctic Poppies, Cottongrass, Wooly Lousewort, and many other small flowers. Along the river, the dwarf willows are finally leafing out.

The Manomet/USFWS field camp on the Katakturuk River in the foothills of the Brooks Range

The Manomet/USFWS field camp on the Katakturuk River in the foothills of the Brooks Range

Dryas and Oxytropis in bloom along the Katakturuk River flats

Dryas and Oxytropis in bloom along the Katakturuk River flats

Caribou use the lingering snow and ice fields to escape the hordes of mosquitos.

Caribou use the lingering snow and ice fields to escape the hordes of mosquitos.

Caribou moving through the valley on their way to the coast.

Caribou moving through the valley on their way to the coast.

 

The bird life here is remarkable. Peregrine Falcons nest on the bluff upriver, and Northern Harriers and Short-eared Owls hunt for lemmings and shorebirds along the valley floor. I spotted a Gyrfalcon overhead one day, but have not seen it again. The willows are full of Eastern Yellow Wagtails flitting constantly among the shrubs along with Common and Hoary Redpolls, American Tree Sparrows, Lapland Longspurs and a few White-crowned Sparrows. About a mile upriver Smith’s Longspurs are nesting, which are at the northern limit of their range. Metta found a Smith’s Longspur nest, which I had never seen before. Two members of the crew saw a single Bluethroat, a bird high on the list of birds I want to see, but so far just the one sighting. I still have another week in this camp before moving to the Canning River, so I have not given up hope!

 

A Peregrine Falcon uses speed and stealth to hunt shorebirds and waterfowl over open tundra.

A Peregrine Falcon uses speed and stealth to hunt shorebirds and waterfowl over open tundra.

Yellow Wagtails were abundant in the willow thickets along the rivers, but always in motion and difficult to photograph!

Yellow Wagtails were abundant in the willow thickets along the rivers, but always in motion and difficult to photograph!

A male Lapland Longspur with a load of food for hungry babies

A male Lapland Longspur with a load of food for hungry babies

A male Smith’s Longspur balances on a willow shrub on a windy day

A male Smith’s Longspur balances on a willow shrub on a windy day

 

The dry upland along the river is perfect nesting habitat for American Golden-Plovers, one of my favorite Arctic shorebirds. We will be tagging six of these birds with satellite transmitters over the next week in order to understand more about their movements within the Arctic National Wildlife Refuge, as well as their migration pathways and timing. Least and Semipalmated Sandpipers and Semipalmated Plovers are nesting along the river and I found my first Baird’s Sandpiper nest only about 250 yards from camp.

Semipalmated Sandpipers nest on the gravel flats in braided river channels. Golden-plovers do not care for the competition and will chase the smaller plovers if they venture into their feeding and nesting territories

Semipalmated Sandpipers nest on the gravel flats in braided river channels. Golden-plovers do not care for the competition and will chase the smaller plovers if they venture into their feeding and nesting territories

Baird’s Sandpipers nest in short vegetation and rely on cryptic coloration and the ability to remain perfectly motionless while on the nest.

Baird’s Sandpipers nest in short vegetation and rely on cryptic coloration and the ability to remain perfectly motionless while on the nest.

American Golden-Plovers always seem to choose scenic nesting locations. This pair nested in a field of Arctic Lupine.

American Golden-Plovers always seem to choose scenic nesting locations. This pair nested in a field of Arctic Lupine.

 

Just to the North of camp, there is a long swath of wetter tundra, which is good for Pectoral Sandpipers, another species we are studying. In an exciting find, we also have nesting Whimbrel in the valley. We heard the Whimbrel on our first night in camp, but when I went to look for their nest a couple of days later I discovered not only their nest but three others within two miles of camp. In total, I think there are between 8 and 12 nesting pair in the area. This is significant because Whimbrel are another species of concern due to population declines and this site may end up being useful for studying nesting and migration.

Female Pectoral Sandpipers are responsible for all of the incubation and chick-rearing duties and are quite protective of their offspring.

Female Pectoral Sandpipers are responsible for all of the incubation and chick-rearing duties and are quite protective of their offspring.

Both male and female Whimbrel share nesting and chick rearing responsibilities. Neighboring Whimbrel will team up to chase off predators like jaegers and falcons.

Both male and female Whimbrel share nesting and chick rearing responsibilities. Neighboring Whimbrel will team up to chase off predators like jaegers and falcons.

Though this Whimbrel pair lost two eggs to jaegers, the remaining eggs hatched and hopefully the chicks will survive to migrate to South America this fall.

Though this Whimbrel pair lost two eggs to jaegers, the remaining eggs hatched and hopefully, the chicks will survive to migrate to South America this fall.

 

We are hopeful that the birds nesting here will do well this year. It was a very early spring on the North Slope and some of the shorebird nests are almost ready to hatch. We have only seen one red fox in the valley, so the main predators they have to worry about are the Parasitic and Long-tailed Jaegers. We have been lucky with the weather for the most part, but naturally, we are grounded by fog this morning as we are trying to fly people in and out for a crew change. Weather changes fast though, so you never know.

Sub-optimal survey conditions are common on the North Slope. We lucked out with the weather for the most part though and Nick Myers was a great pilot and member of the crew. Photo by Lindall Kidd.

Sub-optimal survey conditions are common on the North Slope. We lucked out with the weather for the most part though and Nick Myers was a great pilot and member of the crew. Photo by Lindall Kidd.

Long-tailed Jaegers were very common in the uplands this year. The smallest of the three Jaeger species nesting in Alaska, they eat everything from insects to lemmings to shorebird eggs.

Long-tailed Jaegers were very common in the uplands this year. The smallest of the three Jaeger species nesting in Alaska, they eat everything from insects to lemmings to shorebird eggs.

All-star shorebird survey crew. From left: Metta McGarvey, Stephen Brown, Nick Myers (pilot), Lindall Kidd, Rick Lanctot, Shiloh Schulte, R44 helicopter.

All-star shorebird survey crew. From left: Metta McGarvey, Stephen Brown, Nick Myers (pilot), Lindall Kidd, Rick Lanctot, Shiloh Schulte, R44 helicopter.