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Greetings from Petit Manan!

This week we have been focused on monitoring the productivity and provisioning for the chicks on the island. The tern chicks in our productivity plots have been growing strong, many now weighing over 100 grams. So far during our provisioning stints, we are seeing tern chicks mainly being fed herring, hake and sand lance. These are good food sources for the chicks!

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Common tern feeding its chick a sand lance

We have also seen many adult puffins flying into burrows with fish, which means more puffin chicks may have hatched this week. So far we have confirmed that 3 puffin chicks have hatched, but we are seeing puffins enter some of the deeper burrows carrying fish, which suggests more may have hatched as well.  We will begin puffin productivity this coming week, where we will do a more thorough search to determine how many chick have actually hatched! Unlike terns, which usually only bring one fish at a time when feeding chicks, puffins are able to carry multiple fish in their beaks at a time! This makes provisioning a bit trickier, since rather than having to identify one fish, there could be multiple. Also, the puffins tend to duck into their burrows quickly after landing with food for their chicks which can also make identification difficult. We decided to try putting a GoPro in one of our puffin boxes this morning to see if we could possibly use GoPros in some of the man-made puffin boxes to add to our puffin provisioning data. We were able to take some pictures of a puffin chick being fed by its parent!

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Puffin chick being fed by its parent

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Puffin chick checking out the GoPro

The puffins are my favorite birds on the island, so I look forward to finding more chicks this week!

~Micaela

 

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Petit Manan Island is well known for its seabird inhabitants, most notably our Atlantic Puffins and Arctic Terns. However, a total of eight species of marine birds return yearly to nest on Petit Manan Island. Most of these birds have conspicuous nests, such as the terns and Laughing Gulls which lay their eggs on the ground’s surface. The Alcids, such as Puffins, Black Guillemots, and Razorbills, lay their eggs in burrows or rock crevices, but the adults are still easily observed on the rocks and surrounding waters. But Leach’s Storm-Petrels, the smallest seabird denizen of Petit Manan, are a little bit trickier to detect.

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Jimmy holding an adult Leach’s Storm Petrel that was grubbed from a nearby burrow

Leach’s Storm-Petrels differ from the other seabirds on PMI in a variety of ways. Taxonomically, they are the only species representing a group of seabirds called the Tubenoses to be found on PMI. Also, they are nocturnal and nest in often long, twisting sod burrows.  The burrow entrances are smaller than the size of a fist, and tucked underneath rotting logs, debris and rocks. These life history traits make observing storm-petrels quite the challenge, and prevent accurate estimations of breeding pairs on nesting islands.

This summer we have been testing a new methodology to s
urvey for active storm-petrel burrows. Instead of just reaching as far into each burrow to feel for birds and eggs, we have been playing a recording of storm-petrel vocalizations outside of each potential burrow entrance. The results have been extremely exciting! The birds have been responding with their strange, goblin-giggling call from deep within their burrows. But more importantly, this method has allowed us to find more birds than just by feeling in the burrows. In fact, 63% of the storm-petrels we located only because we heard them – their burrows did not allow us to reach them. Overall, 93% of the adults we located using both methods responded to playback. Hopefully this monitoring technique will provide new insights into Leach’s Storm Petrels nesting on Maine coastal islands!

-Jill

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Hey folks! Jill and Morgan here! It’s been a surprisingly beautiful first week on Petit Manan Island; let’s hope it’s a sign for the whole season! The island has been lively thus far with approximately 200 prospecting Common and Arctic Terns, but we’re expecting many more to come! Although PMI isn’t the largest of islands, it still receives a good deal of visitors, especially early in the season when birds are migrating North – we’ve seen 61 species thus far! Not all our guests have been of the bird variety though; we also stumbled upon a juvenile Grey Seal on our rocky shores earlier in the week!

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Downy Woodpecker sighting!

The start of the season means preparing the island for all the work to be done in the months ahead. This means setting up observation blinds, for band resighting and future monitoring of foraging habits and chick health, as well as collecting marine debris, building burrows for Black Guillemots and Atlantic Puffins, and marking potential Leach’s Storm-petrel burrows. Daily Alcid counts from the top of the Petit Manan Light have also begun. On a windy day it can get rather cold up there, especially for Jill, who hasn’t quite gotten used to the Downeast summer having just returned from a seabird job in the Galapagos!

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Can you spot the Leach’s Storm Petrel burrow? We’ve been searching the island for these small holes in the ground this past we week, and we have found 170 potential burrows!

As we prepare ourselves for the research season ahead, the birds are doing the same. The puffins and guillemots are seeking out rock crevices and other sufficient and creative hiding spots for their burrows. The male terns are attracting their mates with a Sandlance dowry. The Common Eiders are seeking out areas of high vegetation to form their nests. And the Peregrine Falcons, Merlins, and gulls lurk about hoping to catch a bite to eat with all these new dining options in town.

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The Atlantic Puffins have already begun choosing burrows!

Till next time, here’s a joke to hold you over – Why did the Puffin have a stomach ache? Because it had Alcid Reflux!

Best,

Morgan & Jill

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While most of the other MCINWR islands are winding down for the season, Petit Manan is still going strong with major alcid trapping, island-wide guillemot and storm petrel checks, Arctic tern re-sighting, and our new-this-year project: Atlantic puffin feeding studies.

Atlantic Puffin with bill load

Atlantic Puffin with bill load through scope.

Puffin flying to burrow with fish that we have to identify as part of our feeding study

Puffin flying to burrow with fish that we have to identify as part of our feeding study

During our alcid checks, we discovered two little surprises in the form of Razorbill chicks! Only five pairs are breeding here on Petit Manan, so each new chick is very special to us. We even managed to capture one of his parents bringing food back to the burrow, an unusual sight here on PMI

Freshly banded Razorbill chick

Freshly banded Razorbill chick

Razorbill flying with food

Razorbill flying with food

Here are a few more snapshots of what else has been going on at PMI.

Black Guillemot chick being weighed during our weekly productivity checks

Black Guillemot chick being weighed every 5 days as part of our productivity checks

Leach's storm-petrel chick

Leach’s storm-petrel chick

PMI crew banding a puffin chick, minus Julia who took the photo

PMI crew banding a puffin chick, minus Julia who took the photo

A puffin undergoing the banding process

A puffin undergoing the banding process

Wayne and Julia with their first captured adult Razorbill!

Wayne and Julia with their first captured adult Razorbill!

Until next time,

Wayne and Julia

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Photo by Wayne MacCabe

Photo by Wayne MacCabe

This is the Captain, who lives on the walkway in front of the house. What makes him so special to us is he was rescued from freezing rain when he was still inside his egg. One rainy day the area where Captain’s nest was got flooded with collecting rain water. The whole nest and the three eggs inside it were completely submerged in the water and were floating around. The parent was hovering over the nest, unsure of what to do. After seeing this I quickly ran outside and scooped up the nest and re-located it to a nearby high-elevated area. Seconds later Captain’s mother was back on her nest. I was relieved to see this because terns can be sensitive to any slight change to their nest and can be spooked away if they feel something is wrong. Unfortunately, I still didn’t have high hopes for the chick’s survival. I didn’t know how long the eggs were floating in the cold water, they could have passed away from the cold temperatures or from the water sealing up the pores on the egg which lets the chicks breath oxygen from the air. But, to my surprise about a week later Captain hatched and soon after so did his brother, Sailor. I named the chicks this because the nest was floating around like a ship at sea. Now, both Captain and Sailor are fledging!

We have over 2,000 chicks on the island and just our presence here increases the survival rate for these chicks. This is because we deter predators like greater black back gulls, peregrine falcons, herring gulls, and more which will make a quick meal out of the fledging terns and chicks. Realistically, we can not 100 percent stop predation from these species, but we work hard to keep fatality numbers low. Without us working here on the island these birds would likely take over and would have a devastating blow to the tern population. It made me so happy to see that Captain had made it but I noticed I gained a lot more than just satisfaction from seeing him survive, I gained a new understanding of my time here on the island. This event encouraged me because it really showed how my time and work on the island present on the island.

-Laura Bollert

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In my last blog I mentioned that the Petit Manan crew had resighted a banded American Oystercatcher (AMOY) with its mate on Green Island which is adjacent to PMI and only accessible during low tide. After observing the banded AMOY in mid-May, we submitted our finding to the Bird Banding Lab website and received information about the bird. We discovered that it was born and banded as a chick in 2006 on Nantucket Island, Nantucket, MA. It was last resighted in 2014 in Charleston, South Carolina,

Observing American Oystercatcher on Green Island. Photo by: John Fatula

Observing American Oystercatchers on Green Island. Photo by: John Fatula

On our second visit over to Green Island we were combing the north-west side for any sign of Oystercatcher eggs, when we noticed that our 9 year-old banded AMOY, with its mate, were unusually vocal. So, we decided to move out of the area and use a spotting scope to watch from a distance. After about 15 minutes of scanning around we noticed tiny little chick heads in the rocks and sure enough they were 3 oystercatcher chicks!  We all watched through the scope as the adults foraged around and were surprised how quickly the adults can extract the meat from a mussel and feed the chicks (about 3 seconds). AMOY chicks will usually stay with the adults for up to a year to perfect their foraging techniques.

Foraging AMOY with 2 chicks( you can see how camouflaged the chicks are.)

Foraging AMOY with 2 chicks: you can see how    camouflaged the chicks are.

Banded AMOY with chicks. Photo by: Julia Gillis

Banded AMOY foraging with chick. Photo by: Julia Gillis

After further research by Linda Welch we were informed that these were the first AMOY chicks to be discovered on Green Island since 1997! Not only that, they have now become the most northerly breeding pair within their range. How cool! We always thought that Green Island seemed like a perfect place for AMOYs to nest, and have seen them loafing there in recent years, but never found any eggs or chicks as the adults are very secretive.  With just a few alarm calls by the adults, the chicks instinctively hide deep in the rocks of the intertidal zone. Each adult will constantly call and try to lure any predators out of the area. We just hope this pair can keep the prying eyes of the gulls away from discovering their chicks so they can grow up and successfully fledge. And we even received a certificate for our efforts.

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-Wayne

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Common Tern on flagpole

Common Tern on flagpole

Another year on PMI! After two weeks of cold weather and high winds the terns have finally started to nest. Maybe not in the numbers that we are used to but it’s still early enough for more terns to arrive and settle in for the nesting season. The Alcids on PMI don’t seem to waste any time, Atlantic Puffins and Razorbills have already laid eggs at least 3 days ago and hundreds of Black Guillimots are still prospecting all over the island.

First Actic Tern egg

Actic Tern egg

Atlantic Puffin egg

Atlantic Puffin egg

Razorbill egg

Razorbill egg

Tern eggs are made to blend in with beach materials such as sand, pebbles, and seashells but nesting up and away from the beach can be risky as some tern eggs can stand out against the vegetation and island dirt. Puffin and Razorbill eggs don’t need to be camouflaged as most Alcids nest in deep, dark burrows away from the eyes of arial predators. Puffin eggs are all white and a little smaller than the Razorbill’s bigger, speckled egg.

Banded American Oystercatcher resighted  on Green Island

Banded American Oystercatcher resighted on Green Island

Last week while over on Green Island, which is ajacent to PMI and only accessible at low tide, we resighted an American Oystercatcher! We know they try to nest there every year, but haven’t yet been able to resight one yet. Now with the numbers on his bands we can find out who he is.

Memorial Day cookout on PMI

Memorial Day cookout on PMI

Thanks to MCINWR we have a grill this year! Until next time….

Wayne and Julia

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