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Posts Tagged ‘tern’

Hello from Petit Manan Island, this is Hallie again!

I just wanted to write a blog post to give a shout out to the Friends of Maine Coastal Islands! I was lucky enough to get to talk to most of you briefly the other day while you were enjoying the island from the Acadia Explorer — but I did not get the chance to give you all a massive THANK YOU for everything that you do for the refuge. Work like this would not happen if it weren’t for your support. The work that we are doing out here is so incredibly valuable — the seabirds are benefiting tremendously, as well as all of the young scientists who get to learn from the refuge biologists and the abundant wildlife on these islands. Personally, this is an experience that I will be remembering for the rest of my life, and an experience that is helping me take the next steps towards being the scientist and conservationist that I aspire to be one day!

Thank you all so much again for taking the time to sail out here to PMI and give us a warm hello, as well as for all of the endless support! (And especially to Carol for all of the vegan treats she sends our way each week!)

With Many Thanks,

PMI

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Hello everyone, this is Bobby writing to you from Ship Island with some breaking news.

The bird word must have gone around, because as of Thursday, July 11th, 321 nests have been found and marked with more being discovered every day! The chaos on the tern nesting beach area is beginning; the eggs laid in late June have begun to hatch this week. Soon our island will be filled with extremely adorable fuzzy chicks who love to run and hide in whatever grass or shelter they can find!

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One of the first chicks on Ship, easily one of the softest objects one could ever hold.

These toddler-like chicks are extremely curious and will wander away pretty far from their nests if given a chance. With them running around all over, it can be difficult to tell how the colony chicks are doing health wise and how many of these chicks are surviving to adulthood. This is answered through a protocol that all of the islands perform known as productivity plots. This may sound like a fancy term, but essentially Colin and I determined a group of nests with eggs that were laid earlier in the season (in our case in late June) that neighbored each other and constructed fencing around them to enclose this area.

 

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Colin (pictured) and I constantly had terns going at our heads to protect their nests while we constructed productivity plots. This one very nicely went feet first to our heads instead of the usual sharp bill first.

This keeps the chicks from our nests of focus from running all over the beach getting into trouble, that way we can determine how many chicks are surviving to adulthood and the size increases of each chick from each nest within our plots. To determine which chick is which, we put stylish metal BBL bands on their right legs that give them a unique identification number for life in a large online database. Colin and I then check each nest in each plot every morning to monitor the eggs and chicks. I am not a parent, but I imagine how I feel when we look for the chicks every morning it is similar to the stressful situation of a parent trying to find their misplaced kids, as Colin and I are really attached to our chicks in the plots. It has been amazing to see the transformation from egg to chick, and soon from chick to fledgling. Watching them grow up has been so special for Colin and I, and we can’t wait to see each chick’s journey continue. More updates coming soon!

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One of the many chicks hatching this weekend, this one hatched within the hour before this photo with a big world to explore!

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Hello hello all amazing and wonderful seabird fans!

Hallie here, writing from the currently gloomy and rainy but still wonderful Petit Manan Island!

It has been a very exciting week here on the island! We completed our GOMSWG census as Brandon highlighted, and we had a total of over 1400 tern nests, 640 Laughing Gull nests, and 47 eider nests! In addition, we already have over 47 Puffin nests, 54 Black Guillemot nests, 20 Leach’s Storm Petrel nests, and even a handful of Razorbill nests!

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Common Eider ducklings

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Arctic Tern chick with egg-tooth (the white calcified bit on the end of its bill)

But if you are wondering the specific reason why I cannot wipe a smile off of my face — it is because our chicks have begun hatching! After a period of incubation specific to every species, the chick will begin the long and tiring journey of hatching.  Chicks have a specialized calcified bump on the ends of their bills called an egg tooth, of which they use to slowly chip away at the eggshell from the inside, making their way around until they hatch. For most individuals, hatching takes around 12-48 hours, and they emerge looking like cute little fuzz-balls with little flipper feet — and trust me, its adorable.

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4 day old Savannah Sparrow chicks!

From the point of hatching on, for all chicks on the island including the cute little Savannah Sparrow chicks pictured, the job for the parents arguably becomes harder. The chicks not only still require periods of incubation, but they also need to be fed multiple times a day, sometimes even multiple times an hour! We have been finding some chicks increasing in weight by over 300% in a 24 hour period! They honestly grow up so quickly.

For the next few weeks here on PMI, we will be monitoring the productivity and development of our tern chicks, doing provisioning where we will identify fish that the parents are feeding their chicks, collecting fecal samples to look at what the adult birds are feeding themselves, and banding chicks with 2 bands that we can use to re-identify them in later years. Today, if we are lucky, we may even band our first puffling — something that I have honestly dreamed of doing ever since I banded my first bird 4 years ago!

Until next time, bird nerd friends!

 

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Devon and I celebrating his first banded Arctic Tern chick!

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Come meet the 2019 Petit Manan Crew!

Hello all! My name is Hallie Daly, and I am one of the lucky bird-nerds that gets to call PMI their home for the summer. I have been working with wildlife for about 9 years now, having started my obsession when I was just 13 years old. I graduated from the University of California, Davis in 2017 with my degree in wildlife, fish, and conservation biology. I have been lucky enough to have worked internationally on a variety of conservation projects in Romania, the United Kingdom, Guyana, the United States, and most recently American Samoa, with everything from plants, large carnivores, squirrels, bats, and birds. Coming to work with the USFWS at PMI is such an exciting opportunity for me, as I have never worked with a breeding colony of seabirds before! Aside from enjoying wildlife, you can often find me backpacking the John Muir Trail in California, reading books about paleontology, painting, and making horrible puns! I have so much to learn and am so excited to apply my knowledge and skills from my past experiences towards the conservation of these beautiful birds.

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Hallie with a Eurasian Skylark in Aberdeen, Scotland

Hi everyone! My name is Jimmy Welch and I am the supervisor here on PMI for the summer. I am a returning intern and was first a research technician in the summer of 2016 here on PMI. I have since worked with prairie dogs in New Mexico, sea turtles in North Carolina and researched scavengers and small mammals in Maine. I’ve also recently graduated from the University of New England in May 2019 with a degree in Animal Behavior and Environmental Science. I decided I wanted to come back to work for MCINWR and I was lucky enough to be able to return to my favorite island, PMI! I am really excited for the field season and the opportunity to work with such amazing seabird species again. I hope to utilize my previous experience on the island and my diverse field work background to make it a great summer for the PMI crew and all of the wonderful birds here on PMI.

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Jimmy with two black guillemot chicks on PMI 2016

Hey everyone, my name is Devon Jobe and I’m one of the newest researchers working with the USFWS here on Petit Manan Island! I am a rising second-year student at the University of Maine, and am majoring in both Wildlife Ecology as well as Forestry. That being said, this is only my first real position in my field of study and is a totally new and awesome experience for me! I feel so lucky to have been given the opportunity to be part of  such an exciting project working with breeding seabirds, and I can say with confidence that it is shaping up to be the most interesting introduction into the field of Wildlife Ecology I could have hoped for! I still have a lot to learn but I’m looking forward to doing it here on PMI.

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Devon at Wildland Firefighter Training.

 

 

 

 

 

 

 

 

 

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It has been a week full of change on Petit Manan Island.  The majority of terns have fledged and are flying all around the island.  It is a rewarding sight to see given that not too long ago, these birds were just eggs in a slight depression on the ground.  Seeing all the fledglings combined with the fact that two of our crew members (Chris and Bailey) finished up their duties here on PMI is a stark reminder that the end of the season is right around the corner.  I feel very lucky to have worked with both of these people.  Bailey came over from Ship Island a couple of weeks ago and instantly provided a boost to the crew.  It felt like we were able to get so much done with her in the squad.  Chris has been with me since the beginning on PMI, and it is going to be weird to adjust to island life without him in the crew.  His birding skills and overall energy were a key component of our accomplishments this season.  They are as smart, dedicated, and talented as they come and they will be missed.

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Common Tern fledgling.  Photo Credit: Kate O’Connor

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The Crew  (left to right: Bailey, Lance, Kate, Chris, Alex).  Photo Credit: Bailey Yliniemi

While it is a bummer to say goodbye to two crew members, the rest of the crew was excited to observe International Guillemot Appreciation Day this past Friday.  We celebrated by grubbing some guillemot burrows, measuring chicks, and banding them if they were old enough.  Talk about some crazy festivities.  As far as the other alcids go, we have some exciting news.  After patiently waiting for them to grow, we finally were able to band our first puffin chicks.  It is nice to see them get some big-boy feathers to cover up their down and hopefully they will start to fledge before we know it.  We also had our first razorbill chick hatch, which we are all ecstatic about.

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Guillemot chicks moments before banding. Photo Credit: Bailey Yliniemi

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Chris measuring the wing chord of a razorbill chick. Photo Credit: Bailey Yliniemi

 

 

 

 

 

 

 

That is all I have for now.

You stay classy mainland,

-Alex

 

 

 

 

 

 

 

 

 

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It has been a very busy week for the Petit Manan crew as well as all the tern parents on the island. Our first chicks hatched on June 15th and more and more have been hatching each day. These little fluff balls are absolutely adorable but that cuteness comes at price! Like any good parents, the adults have become very protective of their young and are willing to do anything to ward us researchers off which include pecking us and pooping on us. Now that there are chicks out and about the research team has added on a few more tasks to our days. Every day we must check productivity plots we set up around the islands. These plots are basically giant tern baby play pens each containing 6-15 nests. In these pens we track the hatch date of every egg and track the progression of each chick as they grow. In the end, it will give insight on the entire hatching and fledgling success of the tern colony. We weigh the chicks and also band them; that way, when they start running around we can tell who is who.  We also are beginning food provisioning surveys in which we record what the adults are feeding their chicks. We’re hoping to see lots of herring, hake, pollock, sandlance! It’s a fun time to be on Petit Manan and we’re hoping for lots of healthy chicks that grow up ready to migrate down to South America or further this fall.

‘Till next post,

Chris

Pictures: Top L to R; Lance weighing a chicks, an Arctic tern chick, an Arctic tern chick sporting some new bands. Bottom L to R; Kate searching the productivity plot for chicks, a tub full of common tern chicks waiting to be weighed

 

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It has already been over two weeks since the Great Horned Owl roamed the surface of Ship Island looking for a late-night snack. You would think that over time, the terns would settle down and begin to behave “normally.” But that’s not the response we’re seeing. Even today most of the colony begins to sweep high above the island soon after sunset, then disappear quietly out over the ocean. It seems that small numbers do come back to warm their chicks and eggs, but the majority aren’t seen again until sunrise.

The owl caused full colony abandonment during the nights on the island. This occurred for over a week straight, which might have led to some long-term effects on chick physiology. Many of the eggs didn’t end up hatching since they weren’t incubated during the nights. But, some eggs were still able to make it. Typically, eggs hatch after 21-23 days of incubation. With the owl disturbance, incubation length increased, which is why our chicks arrived slightly behind schedule.

Although we have many healthy chicks all around the island, there are a select few that are showing what we assume to be the negative consequences of this over-exposure to the cold and wet nights on a Maine island. When terns incubate, they are constantly rotating the eggs around. This allows for even nutrient and heat distribution throughout the egg as well prevents the embryo from sticking to the shell, allowing it to float in the middle and develop successfully. Without this constant rotation, it’s possible that the chicks could have developed certain physical defects.

 

Not only are we seeing odd chick appearances, but we are also seeing a huge change in colony behavior. The terns have been extremely sensitive to any presence that might seem or sound threatening. This even includes species that are not considered predators. In order to protect themselves, terns often mob, dive-bomb, or attack the predator. They also might flee, just as they did with the owl. Their actions depend on the level they feel threatened themselves versus how threatened their young are. We’ve observed terns going after Common Eiders, Dowitchers, and Harbor Seals. They were even frightened by the sound of a nearby fishing boat. Although we can see that these species are here to do no harm, it’s still good to see the terns working hard and being extra protective.

These actions displayed by the tern colony isn’t uncommon among populations who are or were at risk of nocturnal predation. In fact, it has been witnessed in several other Common Tern studies where owls were present. Looking at a well-known colony observed by Monomoy NWR in particular, you can read how they experienced very similar results years ago (Nisbet and Welton, 1984).

It’s amazing how a single bird can influence an entire colony in only a few days. This owl left an impression on the terns to last the entire season. The fate of this years fledgling was greatly altered and we can only hope that next year the colony works to make up for this years loss.

On a better note, we’re still waking up to a few more chicks every day, and we’ve already seen a few fledge! Based off of our provisioning efforts and weight measurements, our current chicks are growing at a steady rate and being fed a healthy diet, which mostly consists of Atlantic Herring. Some chicks are being fed so much that they actually have to lose weight in order to lift themselves off the ground and fly! We’re glad to finally start seeing our chicks transform into successful adults!

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One of my healthy provisioning chicks. Not quite ready to fledge yet!

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Chicks that were recently born. Only a couple days old!

Only one more week until the island closes. This season really flew by! I’ll keep you updated on any more unusual or exciting events happening on Ship!

-Amanda

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