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Hanging out with research bald eagle number 24

March 13, 2013 by John L. Dengler

Continuing with my recent post on bald eagle research being conducted on the Chilkat River in the Alaska Chilkat Bald Eagle Preserve, I thought it would be interesting to show a video clip and photos of an eagle that is part of a different research project.

Research bald eagle number 24 is one of three eagles that are part of the research study being conducted by Steve Lewis of the U.S. Fish and Wildlife Service in Juneau, Alaska. The study is examining the effects of eagle nest removal at the Juneau airport (approximately 95 miles away). Number 24 is one of a pair of bald eagles who were nesting near the pond airstrip where float planes land and take off.

A year earlier, I photographed research bald eagle number 88, a control bird in that study. Research bald eagle number 88 originally had a GPS tracking pack, but later lost it. Interestingly, I photographed research bald eagle number 24 very near were I had previously photographed research bald eagle number 88.

Photo Gallery

Images of bald eagle number 24

Unlike the eagles I recently photographed that were part of Rachel Wheat‘s study, research bald eagles numbers 24 and 88 have a patagial tag (green wing tag) along with the solar powered GPS tracking satellite transmitter. The transmitter’s antenna can be seen sticking out of the eagle’s feathers to the right of the green patagial tag.


To license video contact me directly. To see our collection of video clips, click here.

Bald eagle research on the Chilkat River

February 24, 2013 by John L. Dengler

On my most recent trip late last fall to photograph bald eagles on the Chilkat River, I made a conscious decision to shake my photography up. While I don’t claim to have the definitive bald eagle photograph (yet), I do have quite a few keepers in my archive. It was time to move beyond simply photographing bald eagles themselves and begin to take a more all-encompassing approach to the subject of the bald eagles that visit the Alaska Chilkat Bald Eagle Preserve near Haines, Alaska.

To start me in that direction, I decided exploring the subject of bald eagles from the perspective of a researcher would be a good place to start. This would allow me to get back to my storytelling roots, while at the same time broaden my knowledge of bald eagles.

So instead of spending time by myself photographing eagles, I spent time photographing those who study them. Lucky for me, there were two distinctly different groups of researchers working on the river while I was there. Both with interesting stories to tell.

Counting bald eagles – Haines School Citizen Science Class

Photo Gallery

Images of Haines citizen science class students counting eagles

First, was a Citizen Science class from the local school. Since 2009, students have been conducting a weekly count of bald eagles during the fall semester for the citizen science class at the Haines School in Haines, AK. The project is part of a field-based for-credit class, sponsored by the Takshanuk Watershed Council, in which students participate in research studies and learn about field data collection. Under the guidance of Pam Randles, Takshanuk Watershed Council Education Director, students count bald eagles in the Chilkat River Valley using spotting scopes at 10 locations and present their data at the Bald Eagle Festival held in November in Haines.

During late fall, bald eagles congregate along the Chilkat River near Haines to feed on salmon in what is one of the largest gathering of bald eagles in the world. This sounded perfect. Students interested in doing real science and fieldwork for their community sounded like a publishable story to me. I also recorded quite a bit of natural sound of the students doing their eagle count survey. My goal is to produce along with the still photo coverage, an audio-only report and perhaps a multimedia report (audio, video, and stills). There were aspects of the process the citizen scientists use to do their counts that made it perfect for an audio-only report. Bet you never thought a photographer would propose something like that!

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Capturing and tracking bald eagles from the Alaska Chilkat Bald Eagle Preserve

While working with the Citizen Science students I discovered they would be meeting a team of researchers who were capturing bald eagles for a migration study of the eagles that visit the Chilkat River in Alaska. The study is being conducted by Rachel Wheat, a graduate student at the University of California Santa Cruz. She hopes to learn how closely bald eagles track salmon availability across time and space. The bald eagles are being tracked using solar-powered GPS satellite transmitters (also known as a PTT – platform transmitter terminal) that attach to the backs of the eagles using a lightweight harness. Helping with the eagle capturing was Steve Lewis, Raptor Management Coordinator, U.S. Fish & Wildlife Service – Juneau Field Office.

Photo Gallery

Images of researchers catching bald eagles

Lewis employed leg snare traps and a net launcher for the capturing. Leg snare traps employ a looped cord on a hinged perch. When a bald eagle lands on the perch a spring is sprung which tightens a looped cord around the bald eagle’s legs. The net launcher uses three projectiles attached to a large lightweight net. A salmon carcass is used at bait in front of the launcher. A radio-controlled trigger to launch the net is used when an eagle lands next to the bait. In addition to the GPS satellite transmitter installation, researchers attached leg id bands and took measurements including blood and a small feather sample for analysis. To keep the eagle calm during the entire process, a hood covered the bald eagle’s eyes and leather booties protected researchers from the eagle’s talons.

Information about Wheat’s bald eagle migration study and the latest updates on the locations of the bald eagles she is tracking can be found on the Ecology Alaska website.

Social media and education outreach are an important facet of Wheat’s project. Wheat along with Yiwei Wang, graduate student, University of California Santa Cruz and Dr. Taal Levi, wildlife ecologist, Cary Institute of Ecosystem Studies funded their various Alaska research projects through an innovative Kickstarter fundraising campaign. I highly recommend that you check out the Ecology Alaska website. They are a group of excited and dedicated scientists who do a great job of making science understandable and fun.

I’m really looking forward to telling the story of both the Citizen Science eagle count survey and University of California – Santa Cruz migration research efforts as I work on producing publishable packages about their work.

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ABOVE: Adobe Flash is required to view the slideshows of Haines citizen science class students counting bald eagles and of researchers capturing bald eagles. Mobile devices should view the photos in the gallery instead.

To license image, click image. To see our collection of fine art prints, click here.

Bald eagles and snow converge on the Chilkat River

February 26, 2012 by John L. Dengler

(Adobe Flash Slideshow – removed)

While it has snowed on all my trips to the Chilkat River to photograph bald eagles in Alaska, it never has REALLY snowed. The couple of inches of snow that I’ve previously experienced in November was nice, but not what you think of when you think Alaska snow. So as I clicked my seatbelt on the Alaska Airlines jet bound for Alaska, I made a silent wish for snow, lots of it.

It took me three days of traveling to reach my final destination of Haines where the Chilkat River empties into the fjord-like Lynn Canal. After overnight stays in Seattle and Juneau, I finally was in the Alaska Marine Highway System’s Auke Bay ferry terminal parking lot waiting to drive aboard the LeConte for the 4.5 hour passage to Haines.

After a crystal blue sky day spent at Mendenhall Glacier just outside Juneau, I sat in the pre-dawn darkness of the ferry terminal parking lot in what seemed like a blizzard. The wind was howling and snow was blasting horizontally but as I would later find out, this was nothing by Alaska standards.

I sailed on the LeConte three months earlier with my wife Carol, returning to Juneau after completing 14 days of photography by way of sea kayaking and wilderness camping in a remote region of Glacier Bay National Park and Preserve. On that return trip to Juneau we sat on the top deck of the LeConte in deck chairs, much like one would do on a cruise ship. It was so warm and sunny that one woman stripped down to her underwear to bask in the sun. Fast forward to November and no one is on the top deck except for myself and two small children who were having great time smacking each other with snowballs in the morning twilight.

Flying with the eagles

I reached Haines and got settled in with good friends Phyllis and Joanne at The Alaska Guardhouse, before meeting with Paul Swanstrom of Mountain Flying Service. Paul, an experienced Alaskan pilot, is a former wilderness guide who also worked in the photo department of a major Chicago-based corporation. Over the years he has flown some big name wildlife photographers (I’m not going to name drop, but its impressive). I felt his background in photography and as a highly skilled pilot was perfect for the aerial photography I needed to tell the story of bald eagles on the Chilkat River.

My primary goal was to take aerial photographs of the Tsirku River alluvial fan where the river meets the Chilkat River. It is here, in the Alaska Chilkat Bald Eagle Preserve, where a five mile stretch of the Chilkat River, known as the Chilkat Bald Eagle Council Grounds, that the largest congregation of eagles gather. Bald eagles come to this area because of the availability of spawned-out salmon and ice free water in late fall. The open water is due to a deep accumulation of gravel and sand that acts as a large water reservoir whose water temperature remains 10 to 20 degrees warmer than the surrounding water temperature. This warmer water seeps into the Chilkat River, keeping this five mile stretch of the river from freezing.

Paul and I looked over maps of the Chilkat River Valley and worked out a flight plan based on light at different times of day, needed altitude for the subject, etc.

Paul then introduced me to his plane, a spiffy fire engine red Bush Hawk-XP, which when I saw it, thought of it as the sports car of bush planes. I’d swear we were off the ground in less than 10 feet but know it took more runway. The plane allows Paul to add skis to the fat tundra tires for landings on snow or glaciers. Virtually, all of my aerial photography experience was as a newspaper photographer in St. Louis where all of it involved helicopters. I was a bit hesitate about shooting from a plane, but Paul rightfully convinced me that it would work.

I needed to meet with Paul right away because he had to begin taking his engine apart in two days to ship parts to the lower 48 for overhauling. If I was to fly, it would have to be either today (not happening – snowing), or tomorrow. The day after tomorrow his engine would be in pieces on the cold hanger floor.

As we shook hands and said goodbye, we both knew that it was almost certain that we would not be flying the following day. It was still snowing and the forecast looked very unfavorable for photography.

The following morning I began my ritual of photographing bald eagles (Haliaeetus leucocephalus) by being on the banks of the Chilkat River before sunrise. Sunrise in November is quite civil as it occurs quite a bit later than in the lower 48. As I made my way up the Haines Highway towards Canada in the advancing twilight, the heavily overcast skies were dripping with rain and snow — definitely not conducive to aerial photography and not a particularly comfortable day for photography on the river bank. I continued driving knowing that between Haines and the area where I photograph eagles there can be big differences in the weather. It can be raining cats and dogs in town and be bright and sunny up the river valley. I have met plenty of photographers who missed a great day of shooting because their decision not to head up the river was based on the weather in town.

After several hours of rain and a little snow, the skies opened up. There were patches of blue and I began to wonder if perhaps I might be able to fly. Conferring with Paul at this point wasn’t possible. I was a good 15 miles out of cell phone range. So I drove back down the Chilkat River Valley to a spot where I knew I would be able to call Paul. We both knew good light would still be a gamble with the rapidly changing nature of weather in Alaska but since today would be my sole chance of flying until next year, I decided it was worth a gamble.

I met Paul at his hanger at the Haines airport and we shot off the runway and into the neighboring Takhin River Valley to get into position for the Tsirku River delta. The weather was what I expected with portions of the flight having good light and others marginal with flat lighting. Paul maneuvered the Bush Hawk -XP perfectly into the shooting position we had earlier discussed. An unplanned bonus of the trip was jumping over the Takhinsha Mountains and looking down on McBride Glacier in Glacier Bay National Park and Preserve where I had kayaked in July. The mountains looked familiar, yet different now that they were blanketed in snow. The park seemed asleep, much like the Flint Hills tallgrass prairie in Kansas when I had visited there just a few weeks earlier. The Glacier Bay area is breathtakingly beautiful from the air. I always thought the best job in the world was that of a photojournalist. I still think that is true, but I now think that the second best job is that of a flight-seeing/charter pilot in Alaska. Paul is a lucky guy with one hell of an ‘office’ view.

Unusual sightings

On subsequent days, I stuck to my routine of being in place on the river early. The first stop I would make would be at the location where the bald eagle with white wing tips and talons was hanging out this year. This bald eagle is known as a leucistic bald eagle. Its white wing tips and talons are caused by a leucistic condition — a condition of reduced pigmentation resulting in white patches. These patches of white can occur while the rest of the animal is colored normally. Unlike albinism, the eye color is normal. Seeing this eagle was like seeing an old friend as I had photographed it several years earlier on the nearby Chilkoot River. The one thing I was surprised by watching this eagle was just how much, and often he ate. Since he stood out with his leucistic characteristics, it was easy to keep track of his meals. From watching bald eagles, I had the impression that eagles didn’t eat very often. For me, waiting for hours on end in the cold for action lasting no more than an eye blink, I would have guessed that 99% of their time was spent sitting on a tree branch or on the gravel bar taking bets amongst themselves on how long the crazy photographer would last. Considering the time I spent observing the white tipped eagle perhaps that is a false assumption.

Another unusual sight on this trip was when I saw a bald eagle drag a fish 15-20 feet up from the Chilkat River bank through the snow. Dragging a salmon that far of a distance is somewhat unusual as eagles usual drag a fish just barely out of the water onto the bank. Bald eagles are pretty dang lazy about putting out any effort to feed, particularly at this time of the year. What was more unusual was that the eagle dragged the fish right up to another eagle sitting on a log as if it wanted to share the salmon with the other bird. Normally, eagles challenge and fight each other. Formal sharing, is something I’ve never seen. In the end, the niceties didn’t last and the eagles were off trying to chase each other away. The winner in all this turned out to be a black-billed magpie who moved in and feasted on the fish while the two eagles chased each other in a circle.

(Adobe Flash Slideshow)

I’m always asked if I saw bears. I usually do, and often see their footprints in the fresh snow falls overnight. Along with the grizzly bear tracks I saw on this trip, I photographed an orphaned grizzly bear cub. The cub seemed to be enjoying life, but I knew what he didn’t know. That life was going to get very bad for him in the upcoming winter months and his survival was in question.

I missed a bit of excitement while I photographed eagles on another part of the river. Another photographer spotted a bald eagle whose wings were both frozen flat against the Chilkat River ice. An volunteer from the American Bald Eagle Foundation in Haines, slide out on the ice on her stomach and clipped the tips of the eagle’s feathers that were frozen to the river ice. The rescue was a success and the bird was expected to be back in the Alaskan skies after rehabilitation time at the Alaska Raptor Center in Sitka for feather mending. I would have liked to have witnessed the rescue and subsequent treatment.

Dealing with the snow

It seemed like it snowed every day, though in reality, there were several blue sky days. One day, we had a true blizzard, even by Alaskan standards, with building rattling, 50 mile per hour winds. In roughly 36 hours a total of 52 inches fell. That much snow, that early in November, was unusual. I’d say I got my wish for snow and then some.

The snow was very helpful for photography. Besides making the already incredible scenery more so, the blanket of snow did wonders for cleaning up extraneous visual noise in my bald eagle photos. Many of the bald eagles that I take photographs of are on visually cluttered gravel bars or river banks. The snow cleaned these shooting situations, almost like the eagles were shot in the studio on a white seamless background.

The only drawback to the heavy snowfall was that it made exploring a bit more difficult. One of my usual afternoon haunts is the Chilkoot River. I like to go to the Chilkoot in the afternoon as you’re on the opposite river bank from what you would be on the Chilkat avoiding the afternoon backlit light of the Chilkat River. With all the snow I wasn’t surprised this year to find the entrance to the Chilkoot Lake State Recreational Site and the Chilkoot River, to be completely blocked by snow. The only way in was going to be on foot with snowshoes.

A few days earlier, my friend Phyllis gave me some pointers on snowshoeing. Wanting to show me in the deepest snow possible, Phyllis with her dog Harry, drove me out in the direction of Chilkat State Park. The park is closed this time of the year so the road doesn’t get plowed. The snow was getting REALLY deep as Phyllis wrestled the car through the drifts. Eventually, the snow was too much and we were stuck. That meant it time for snowshoeing as we (and a very nervous Harry) waited for Joanne to come rescue us with her pickup truck. The snowshoes I used weren’t like the tennis racket ones you saw on the old TV series, Sergeant Preston of the Yukon. These were sleek, lightweight aluminum ones. For the rest of the trip, I would use them whenever I would go off the beaten path. I found them particularly useful for going up and down steep riverbanks. Many of these riverbanks would have been difficult to climb without the deep snow. The snow, and the snowshoes, made climbing them with my large tripod, 600 mm lens, and heavy cameras, much easier. The only bad thing was I was always breaking a trail since I was usually by myself on these treks. In deep snow, even with snowshoes, hiking can be taxing. The trips back were always much easier as I would backtrack over my path. Snowshoes are great!

I’ve written in the past about taking a small camping sleeping mat to stand on to keep my feet warm while standing in the snow. Having the mat on this trip proved to be even more important with all the snow; as you can see in this photo of one of the spots where I photographed the bald eagles.

Technical tips

For the past year, I’ve been shooting using manual aperture and shutter speed with auto ISO as my exposure setting. I really like this mode and it allows me to be in control of the appropriate aperture and shutter speed letting the ISO setting be the variable. For consumer DSLR cameras that could be a problem as the ISO creeps up, but with a professional DSLR like my Nikon D3 that isn’t an issue. Considering my positive experience this past year with this configuration I’m likely to use this setting in the future.

I’m assuming that you’ve watched the slideshow at the top of this posting of images from this trip. It may seem like there aren’t as many images from previous trips. This is because I have become more selective, and do not want to put duplicate situations into my photo archive. I’ve even eliminated previous archive images with new work that I feel is stronger. I like to think that this means that my work is improving and evolving.

Speaking of evolving, I shot video for a few hours. I didn’t get anything special (you can see the video here), but wanted to see what challenges shooting video here would be. I plan to work on this during future visits to Alaska.

By the time I left Alaska a total of 88 inches of snow had fallen in the Haines area. I know my Alaska friends in Haines have had their fill of snow by now, but I’m thankful that my wish for snow came true.


ABOVE: Slideshows require Adobe Flash.

For more photos see:
Gallery of bald eagle photos from the Chilkat River and Chilkoot River
Gallery of landscape photos from the Haines, Alaska area
Gallery of photos from the Juneau, Alaska area
Gallery of photos from Glacier Bay National Park and Preserve

Bald Eagle Number 88 – tagged for airport eviction research

November 24, 2011 by John L. Dengler

Bald eagle Number 88 (photographed here on the Chilkat River in the Alaska Chilkat Bald Eagle Preserve near Haines, Alaska) was originally tagged by the U.S. Fish and Wildlife Service in Juneau, Alaska as part of a study examining the effects of nest removal at the Juneau airport. Steve Lewis, of the U.S. Fish and Wildlife Service, was quoted as saying that Number 88 was a control bird matched with a pair of eagles that were nesting near the pond airstrip where float planes land and take off. The eagle originally had a GPS tracking pack but lost it this summer. SPECIAL NOTE: iPhone photo, also embeded GPS location data in this iPhone is NOT the location where the eagle was photographed. This image of the image was photographed the following day in a different location. (John L. Dengler)

Over a three year period, I have talked about a leucistic, white-tipped bald eagle, that I have watched and it is always interesting to see where this eagle shows up. A few days ago, I spotted another special bald eagle while on the Chilkat River in the Alaska Chilkat Bald Eagle Preserve near Haines, Alaska. In this case, the eagle is easily identifiable by a large numbered green badge that is attached with a rivet-like coupling to its wing.

Photo Gallery

Images of researchers capturing bald ealges

According to the Takshanuk Watershed Council website bald eagle Number 88 was originally tagged by the U.S. Fish and Wildlife Service in Juneau, Alaska (roughly 95 miles away) as part of a study examining the effects of nest removal at the Juneau airport. Steve Lewis, of the U.S. Fish and Wildlife Service, was quoted as saying that Number 88 was a control bird matched with a pair of eagles that were nesting near the pond airstrip where float planes land and take off. The eagle originally had a GPS tracking pack but lost it this summer.

Like the leucistic bald eagle, it will be interesting to see where Number 88 shows up in the years to come. Knowing that you are seeing the exact same bird year after year is like seeing an old friend.

For those interested, I spotted bald eagle Number 88 at 11:33 a.m. AST on Nov. 17, 2011 in the Alaska Chilkat Bald Eagle Preserve on Chilkat River near Haines, Alaska. My GPS coordinates were Latitude N59° 23.149′, Longitude W135° 51.030′, when I took the photo with my Nikon 600 mm f/4 lens.

UPDATE: In late May 2013 Lewis reported that bald eagle Number 88 was found dead on the Klehini River. While Lewis doesn’t know the cause of death it appeared that the eagle might have died of starvation.

UPDATE: In late October 2012 I spotted Bald Eagle Number 24, also part of this study, on the Chilkat River not far from where I spotted bald eagle Number 88 the year before.

This bald eagle (Haliaeetus leucocephalus) resting along the banks of the Chilkat River in the Alaska Chilkat Bald Eagle Preserve is equipped with a patagial tag (#24), a leg band (4G) and a solar powered GPS tracking satellite transmitter. The transmitter antenna can be seen sticking out of the feathers to the right of the green patagial tag. The eagle is being tracked by Steve Lewis of the U.S. Fish and Wildlife Service in Juneau, Alaska as part of a study examining the effects of nest removal at the Juneau airport (approximately 95 miles away). During late fall, bald eagles congregate along the Chilkat River near Haines, Alaska to feed on salmon in what is believed to be the largest gathering of bald eagles in the world. (John L. Dengler)



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