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Posts Tagged ‘chicks’

Hello from Metinic!

We’ve been stuck in foggy weather lately so the sunshine today was great!

On Metinic Island we monitor an assortment of birds, one of these is the black guillemot. On July 2nd we found our first guillemot chicks. So lets talk a bit abut these charismatic birds.

We monitor around 20 nests every three to four days. This monitoring is no easy task, because the guillemots like to nest on the rocky coasts here. The first thing we have to do is traverse the rocks out to places where we have nests marked, and that’s not even the hard part! The next step is to peer into the crevasse where they’ve nested. Sometimes we peek in and see an adult on eggs, other times we spot one to two eggs and recently we’ve found chicks!

Sometimes though we can’t even see the nest so we muster all the bravery we can and stick our hand shoulder-deep into the rocks and feel around. Frequently we are lucky enough to feel eggs. Other times we might get a quick jab from a parent, which always makes you jump. Once chicks are in the nest we might even end up with our hand in chick poo. The best thing to grab though is a fluffy little chick. Once we get ahold of them we gently extract them from their rocky hole, weigh and measure them. Eventually we will be banding them so that they can be identified in the future.

I honestly think the guillemot chicks are one of the cutest. Pitch black except for when they open their bright red mouth. Once they are adults their feet will also turn bright red and they will develop white wing patches that make them very distinguished.

Check back in next week for more from Metinic!

Guillemot Egg

Black Guillemot egg in nest

Guillemot Chick in Nest

Black Guillemot chicks in their nest

Guillemot Chick

“Excuse me! Put me down.”

Guillemot Chick 2

First Guillemot chick found this year

Black Guillemot Jumping

Adult Black Guillemot jumping out of its nest

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Hello from Metinic!

Sequoia here with this week’s blog. Last Wednesday the 17th we had staff come out to the island to assist us with the GOMSWG census. During this census we identified all nests in the colony. This year we counted 910 tern nests, this is a record for Metinic! This number is also lower than the actual nests present because no matter how hard we try we aren’t perfect at detecting nests. To account for error we use the Lincoln Index which is a form of mark recapture, where we go out and see what percent of the nests were missed. Once this correction was applied we have an estimated 1,021 nests on the island!

We also had some exciting things happen during our census. We found a Leach’s Storm-Petrel, a Savannah Sparrow chick evading a snake who had already caught its sibling, and a few Spotted Sandpiper chicks running around on their stilt-like legs.

Other exciting news, we had our first chick hatch on Friday! An Artic tern chick was the first to be found in our productivity plot. We nicknamed him Eddy due to the fact that Eddy Edwards, the Deputy Refuge Manager, had the closest guess to the number of nests on the island, which we all thought was a bit high but were proven wrong. Friday afternoon and into the weekend we had many chicks hatching, so now we are getting into the grove of weighing, measuring and banding each chick in our productivity plots.

Through all of our adventures we are sometimes lucky enough to be fueled by the homemade snacks that Carol sends out to us, which we greatly appreciate!

Until next time.

COTE's flying

Common Terns tend to be the more tenacious nest protectors. This photo was taken while measuring chicks and getting hit by the parents.

Snake Eating SAVS

This is a good example of Garter Snake predation on Metinic. It’s munching on a unlucky Savannah Sparrow chick. We’ve sent 31 snakes back to the mainland so far this year.

COTE Chick Bum

“You can’t see me”

ARTE Chick with Egg (EDDY)

Eddy, our first chick on the island. Here he is 24 hours old.

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While the other islands are expecting their first chicks any day, we watched as all of our terns left their eggs behind. We were hopeful this year! We had over 100 nests and over 200 eggs. Yet, once again, Ship Island has experienced a colony abandonment!

During the first week of June, we had found some predated terns, likely due to a Peregrine Falcon. Ship is located only a few miles from Mt. Desert Island where several pairs are known to nest. Our worst fears were confirmed when Andy and I both flushed the falcon on June 8. As the day went on, tern numbers decreased dramatically from 300 to 50. By the evening, they were all gone.

We weren’t just only concerned about Ship. Over on Trumpet Island, there were no gulls. A predator like a falcon wouldn’t cause the gull colony to abandon as well. We began to suspect an otter attack. Although the gulls eventually returned to the island, we visited the following day to look for predation signs. We were relieved to find nests and eggs intact. We even found some newly hatched Herring and Great Black-backed Gull chicks! However, we think we now know the likely culprit: an owl.

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We got right to work, setting up more traps and beginning all night stints. But, what do we do to encourage the terns to come back? Since terns nest in colonies, they won’t nest if there aren’t others terns around them. So, we have to trick them into thinking there are terns there already!

Currently, there are over 30 Common and Roseate Tern decoys around the nesting grounds. To complete the illusion of a lively tern colony, a solar-powered sound system has been set up. During the day and night, we play recordings of a colony on speakers.

Although we haven’t caught our owl yet, we think the decoys are working! Throughout the week, we’ve seen more terns returning and staying longer. Just today, I even witnessed courtship rituals and nest scraping! We’re doing our best to give them space to allow the colony to start back over.

Hopefully next week we’ll have some better news to share!

Percy

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Greetings from Ship Island!

Bobby Brittingham here! As my time is coming to a close on Ship Island, I wanted a chance to post one more educational blog about our work before a farewell blog!

You may or may not have heard about “bird banding” before, it is an extremely common form of essentially tagging and releasing birds. Using specialized pliers, a small metal “C” shaped band is clamped shut around a bird’s tarsus (leg-like the shin bone equivalent to humans).

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BBL size 2 band, with the identification number, these are the bands used on all of the birds on Ship.

The banding database provides a lot of information on each bird, where they have been seen, where they nest, where they migrate, or even if the bird is alive, as long as the bird’s band is seen and read correctly by another researcher. These bands are essential to distinguishing one bird from another to perform other research procedures or to distinguish which bird belongs to which nest. On Ship we had very late nesting, so Collin and I have been banding as many chicks as possible with our limited time so that these birds can be identified on where they go over the next year.

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Collin banding with specialized pliers, one of Collin’s first banded birds!

Bands vary in size and number of letters based on the size, type of band, and/or species of the bird. For the common terns on Ship Island, a single size 2 “BBL” band is placed around their right leg; these bands each have a unique 9 digit number.  These bands are then entered in an online database through the United States Geological Survey (USGS), and the “status” of a bird can be updated by individuals all over the world. For example, a tern was banded on Petit Manan this summer, and it has already been spotted by another researcher in Venezuela all the way in South America!

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The chicks do not mind the bands as long as they’re put on correctly. When they are put on right, they even look stylish!

For me personally, it is the most fun protocol we perform out here, nothing beats the feeling of getting to meet hundreds of chicks that I have the privilege to watch over every day on this island. Not only that, but it is crucial for research purposes. With the late nesting that occurred this year on Ship, it will be interesting to see where these birds could have possibly gone earlier this year by resightings of the chicks that we band this summer. Be on the lookout for one more blog from the Ship Island crew later this week!

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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!

fuzzy boy

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.

 

COTE on colins head

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!

wet baby tern

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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Hi everyone! My name is Kate O’Connor and I am super excited to be spending my summer out here on Petit Manan Island. I just finished my second year at the University of Maine studying Wildlife Ecology and this is my first experience working exclusively with birds… and living on an island! But, the island is beautiful, and we have a great crew out here, so it was an easy transition making PMI my home away from home.P1040291

Just recently, we stared fixing up and learning how to use some of the traps we will be using on the terns and Puffins for when we start banding – which is soon! We are finding more and more eggs from all of the birds, and were especially excited about being able to mark our first Guillemot and Razorbill burrows, and see the first Eider chicks swimming around with their momma! We’ve also been seeing more wildlife, including Common Murres, which haven’t historically bred in Maine, and a few seals these past few days which is always an exciting sight.P1040431

We’ve welcomed a PhD student from North Dakota onto the island as well, who is studying laughing gull eggs and chicks, and so far she’s been getting a lot of work done – we’re very excited for her! She’s been a great addition to the island and it’s always a great time helping her out when we get a chance.P1040304

The past few days have been very busy, and there’s only more to come. Island life is amazing, and I couldn’t imagine doing anything else. The weather is looking clear, sunny, and warm(er), and the crew is having a great time.P1040331

~Kate

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We found our first Common Tern nest, and couldn’t be more excited! Since finding our first nest, we have marked over 50 nests and have been monitoring them daily for signs of predation. We have taken note of close to 100 nests in our little colony, while keeping a close eye on any signs of unusual activity that could result in predation. We have been observing more and more terns visiting the colony and spending the night with us.

Yesterday, we headed over to Trumpet Island with refuge staff to conduct a census. While on the island, we walked 3m apart and counted all gull (Great Black-backed and Herring) and Common Eider clutches observed. Not only did we census Trumpet, we also got to observe a Great Black-backed Gull chick hatching!

Although the gull chicks were adorable, we cannot wait for our tern chicks to start hatching!

Your 2018 Ship Island Crew!                                                                                                                 ~Olivia and Bailey

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Petit Manan Island is in peak hatching season! The small, delicately speckled brown tern eggs are disappearing and being replaced by similarly patterned fluffy chicks. The oblong, white-brown spotted black guillemot eggs are opening up to reveal all-black downy chicks. Where once we were seeing large, gleaming white puffin eggs, now chicks with long grey down and white bellies are hiding quietly in their burrows. We even have found one razorbill chick (see photo below)! The only seabird still solely in the incubation stage are the Leach’s storm-petrels.

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One question that I often get asked is, why do some seabirds only ever hatch one chick (think puffins, razorbills, storm-petrels), while others can rear multiple chicks (terns, guillemots, etc)?

In general, seabirds have small clutch sizes compared to birds of other groups like most waterfowl, game birds, and some perching birds. This is because seabirds, unlike the groups mentioned previously, tend to have long life spans. This means it is not quite as critical for seabirds to have a successful nesting season their first breeding season or every year of their life in order to replace themselves in the population. Other bird species may only get one chance to successfully reproduce if annual adult survival is low due to high depredation of adults and/or other factors.

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But why lay only one egg instead of two or even three? There are multiple factors that influence seabird clutch size, and still many questions to be answered. Chick rearing is very energetically demanding for the parents, from egg formation to providing enough food for growing chicks. Right from when birds arrive on the breeding grounds, food availability is critical. After long migrations or rough winters, seabirds need to be able to find enough resources near their breeding colony to allow them to be in proper condition for breeding. Limited food resources during this period of time can cause birds to lay smaller clutch sizes, or even not nest at all.

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This still does not answer our question why puffins and other species only lay one egg, in both good and bad food years. For species with one egg clutches, it is more beneficial for the long-term survival and breeding success of the adults to raise only one chick at a time. Raising two chicks would probably not be impossible during good food years, but the energetic costs on the parents might make this not worthwhile in the long run. So puffins, razorbills, and many other seabirds prefer to take things slow, laying only one egg per season.

Currently, we have found 17 black guillemot chicks, 15 Atlantic puffin chicks, one razorbill chick, and a few hundred tern chicks!

-Jill

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The beginning of the week started out slow and rough as the weather was not cooperative.  High winds made it so we could not go out to the tern colony as we wanted the adults to stay on their eggs and keep them warm from the howling winds.  Finally the weather broke Tuesday afternoon and we were able to do some trapping and banding of adult terns.  We do this by selecting a couple of nests, replacing the eggs with wooden ones so they do not get damaged, and placing a chicken wire trap over the nest with the door open.  When the adult walks into the trap, they step on a trigger platform that closes the door.  As the adult sits in the trap incubating the wooden eggs, we walk up and take it out of the trap through a hole in the top.  The adult is then placed in a bag where it is weighed using a spring scale.  We then band the bird and measure its wing chord and head-bill length before it is released to return to incubate its eggs which we have switched back to the real ones.

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A common tern checking out the trap

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Measuring wing chord length

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Measuring head-bill length

Wednesday we headed over to Matinicus Rock to help them with their tern census.  It was nice to get out to another island to see what was going on there; plus we got to see Atlantic puffins, razorbills, and common murres, three species that do not nest on Metinic.

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Atlantic puffins on Matinicus Rock

The next day it was our turn to census!  With the help of a few guests, we were able to count 608 nests in our colony of arctic and common terns!  We did this just in the nick of time as we came across multiple hatched chicks with more popping up every day!  The rest of the week was spent securing our productivity plots which are circles of fencing surrounding a number of nests.  When the chicks within the plots hatch, we record the hatch date and band them.  Every time we visit the plots, we weigh the chicks and keep track of how they are doing until they fledge.

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Pipping arctic tern egg

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A hungry chick waits to be fed

Throughout the week we have also come across savannah sparrow chicks and fledglings, and spotted sandpiper chicks running around on the rocks.  An identifying characteristic of spotted sandpipers is they bob their rump up and down as they walk; it is funny to watch the tiny fuzzy chicks do this as well!  We are looking forward to more chicks showing up in the upcoming weeks!

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A tiny spotted sandpiper chick

Until next week,

Helen

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