Tag Archives: Wilson's Storm-Petrel

Boothbay Mini-Pelagic with Cap’n Fish’s, June 6, 2022.

The first of our pelagic birding opportunities for the year took place on Monday, June 6th, as I joined the good folks from Cap’n Fish’s Cruises in Boothbay Harbor for a special ½ day mini-pelagic. 

We motored our way east to Eastern Egg Rock, looking at Common Eiders, Black Guillemots, Ospreys, and many other inshore denizens. Once we got to Eastern Egg Rock, however, the fun really started!  The cacophony of the colony was evident on this gloriously calm day, and it was not hard to find plenty of Atlantic Puffins in the water near the boat. 

We worked the masses of Common Terns to isolate a few great views of Roseate and Arctic Terns. The bright sunny day was a delight except for when trying to judge grayscale. That made tern identification a little more challenging, but we worked our way through it before departing the island for deeper waters. We had a good total of 7 Razorbills on and around the island, which is no guarantee on a visit here, and while we didn’t have the one Common Murre that has been lingering on the rock, we did have one fly-by later in the trip.

Bright sunlight made tern identification more challenging!
Razorbills
Black Guillemot
Common Tern
Roseate Terns

With seas barely 1-2 feet, just a puff of wind, and abundant sunshine, it was just a gorgeous day offshore. We cruised through a wide stretch of uneventful, flat bottom, but once we hit deeper waters, we began to see a number of Wilson’s Storm-Petrels. There were a lot more at our first deeper hole, but then when we got to our primary destination, it was clear how abundant they were.

We laid down a 4-mile long chum slick, and then slowly cruised back through it.  With the calm seas, it held together perfectly, and boy did it work!  It was actually incredible.  Unfortunately, other than a few Herring and Great Black-backed Gulls, it was 100% Wilson’s Storm-Petrels!

One of the ways to find other storm-petrels among masses is to look for the lack of obvious wing molt. This bird caught Jeannette’s eye because the wing is so clean and not showing any signs of flight feather molt. It’s a Wilson’s though, but could it possibly be another subspecies? Individual variation? Age?
Or, just something slightly different to look at?

But what a show they put on! Dan, Jeannette, and I did our best to estimate the abundance, as this was truly a special event. Our estimate of a trip total of 2,600 birds included an estimate of 2,000 in our chum line! 

We spotted the occasional Northern Gannet throughout the trip, but we desperately awaited another tubenose. Checking flight style, foot extension, wing bars, and underwing patterns, but yup, pretty darn homogenous.  As a leader, I tried to check every bird. But the sight was impressive, and I couldn’t help but utter superlatives and occasionally just sit back and enjoy the show. 

First-summer Northern Gannet.

We had to increase speed to make it back to the dock on time, but we continued to tally Wilson’s Storm-Petrels on the ride in. And Jeannette, Dan, and I worked hard to find something – anything! – else pelagic!  We don’t have a lot of data on what is out here in June, and it’s likely different every year depending on water temperature and breeding success and/or failure of these “winter” visitors from the sub-Antarctic waters. In fact, one some June whale watches I have been on, I haven’t had a single species of tubenose – let alone 2600 of them.

After last June’s adult Pacific Loon, I did have to have Captain Nick slam on the breaks when I spotted a decidedly gray-naped loon. When it surfaced, it was evident it was just a young Common Loon with an unusual amount of wear or bleaching on its head. It was worth a try though!

While our species list wasn’t legendary by any means, I’ve never seen this many Wilson’s Storm-Petrels in one, relatively short boat trip. In fact, this is by far the most I have ever seen together in Maine waters. Additionally, we had great looks at some of the Gulf of Maine’s most sought-after breeding seabirds to kick off the day at the birthplace of the Project Puffin.  And the weather, wow, the weather – what a day to be on the water!  And a great introduction to pelagic birding: the most exciting (and yes, at times frustrating) part of pelagic birding is every day, every trip, is so different, and it takes a lot of trips to appreciate the best of them.

We have two more trips planned with Cap’n Fish’s this summer. On July 15th, I’ll be joining the on-board naturalist for a visit to Eastern Egg Rock followed by a little birding-while-whale-watching. Then, on October 11th, it will be the second of our dedicated half-day pelagics, including chumming. Since we won’t have activity at Eastern Egg Rock at that time of year, all our time will be dedicated to finding birds offshore.  Information and registration for these two trips – and our summer tours to Seal Island as well – can be found on the Pelagics Page of our website.

Here is our complete trip list, from the time the horn blew as the boat pulled out of the dock until we returned to the slip. Our estimates at Eastern Egg Rock are very conservative, and likely dreadfully low. Offshore, we worked hard at estimating individual groups of storm-petrels and tallying exact numbers of other birds offshore. There were also likely many more eiders, guillemots, and cormorants on the outer islands, but our focus was on finding more seabirds!

2 Canada Geese

2 Mallards

180 Common Eider

30 Rock Pigeon

1 COMMON MURRE

7 Razorbills

62 Black Guillemots

151 Atlantic Puffins

427 Laughing Gulls

45 Herring Gulls

15 Great Black-backed Gulls

15 Roseate Terns

1271 Common Terns

42 Arctic Terns

20 Sterna sp (offshore)

13 Common Loons

2, 600 Wilson’s Storm-Petrels (incredible tally!)

20 Northern Gannets

168 Double-crested Cormorants

1 Great Blue Heron

12 Ospreys

3 Bald Eagles

1 American Crow

10 Barn Swallows

4 European Starlings

4 House Sparrows

  • Other Marine Life:

2 Mola Mola

2 Gray Seals

6+ Harbor Porpoise

10++ Harbor Seals

Mola Mola (aka Ocean Sunfish)