Showing posts with label Bridled Tern. Show all posts
Showing posts with label Bridled Tern. Show all posts

Monday, May 25, 2015

Birding North America's Deep End

Any serious ABA-area lister with the stomach for pelagic birding has to make at least one pilgrimage to Cape Hatteras to venture offshore with Brian Patteson.  Hatteras provides convenient access to gulf stream waters and continental shelf break, with unparalleled opportunities for deep Atlantic Ocean bird species unlikely to be encountered anywhere else in North America.

The best chance to see the most elusive target species lies at the end of May when Brian runs his 'spring blitz,' with 11 consecutive trips.  It represents a sort of mecca for elite North American birders.  The Attu guides with decades of Alaska vagrant-hunting under their belts come out here year after year, hoping for a mega-rarity or a better look at the mega-rarity they glimpsed on a previous trip.  One Canadian birder on board was sheepish about his ABA list of 'only' ~750.  Another birder in town from Montana signed up for all 11 trips, hoping to sweep the table of rarities in one season.  Other birders had arrived from Oregon, the British Isles and Austria, all well-seasoned twitchers keen for a rare chance to tick multiple life birds in a few days.

I enthusiastically took the opportunity to spot on the first three trips of this season.  I've done plenty of spotting aboard the Stormy Petrel II, but this was my first time at it in May and under such pressure to perform.  Luckily Brian and his first mate, Kate Sutherland do all the heavy lifting, and I had the sharp eyes and big lens of Mike Lanzone to help carry the spotting burden. 

Day one was Pomarine Jaeger day.  I'm not sure how many crossed our path throughout the day, but there was almost always one trailing the boat, taking futile swings at the scurrying Wilson's Storm-Petrels and dipping into the wake for chum.
Pomarine Jaeger



Pomarine Jaeger


Pomarine Jaeger and Wilson's Storm-Petrels

Every now and again one would make a low pass over the bow just out of arms reach.
Pomarine Jaeger


The biggest surprise of the day was a young Bridled Tern loafing around on flotsam.  Spring is the breeding season for this species, so they are rather uncommon offshore until late summer. 

young Bridled Tern



Day 2 was another big one for kleptoparasitic species.  We had a couple Parasitic Jaegers around the boat and then a pair of friendly South Polar Skuas.  It was wild watching the Black-capped Petrels divebomb these birds.

Parasitic Jaeger (dark morph)
South Polar Skua


Just after the first of the dark Parasitic Jaegers appeared, a second odd dark bird showed up, but this one was a pterodroma--a Trindade Petrel!  This is one of the rare gadfly petrels that we hope to see.

Several Arctic Terns braved our attendant skuas and jaegers and fed in the wake, giving close enough looks for all to tell them apart from the similar Common Terns which were also seen frequently. 

Arctic Tern

A few Arctic Terns had been recently blown onto shore in North Carolina by the passing of a tropical storm.  I hadn't been able to chases these birds, so was glad to see them offshore and add them to my list.  Apparently all you need to see them out on a pelagic in May is a bit of an easterly breeze.

Arctic Tern


The east wind also seemed to bring out the Leech's and Band-rumped Storm-Petrels.  We saw several of each on our second day.

On Day 3 a front arrived bringing much cooler weather and winds out of the north.  This seemed to blow away the jaegers and skuas and most of the storm-petrels, but there seemed to be just as many Black-capped Petrels around, so we had a mind for pterodromas.

We had more arctic terns and the usual assortment of Sooty, Cory's and Audubon's Shearwaters--seen each day so far.  But other than a few tantalizingly brief and/or distant glimpses of Trindade Petrel our day was looking to be a bit of a bust.  But at 1:30, just as we were about to begin our run back to shore Brian shouted, "Fea's Petrel four o'clock!" In zipped a gray-backed petrel with dark underwings bouncing in and out of the swell.  For a panicked few moments we shouted instructions on its rapid movements.  It disappeared in the chum slick for a few moments before taking off again.  I watched it bound off into the distance.  It would appear above the horizon slightly smaller after each successive arc until it became a small dot and then disappeared. 

Sometimes it takes some quick reflexes and sharp eyes to catch a glimpse of the rare petrels.  When they come in to the boat they don't often stick around and pose for photos and are then miles away again in a moment.  It boggles the mind to think of the hours of preparation and effort that go into an outside chance of a brief view of these elusive birds.  I had been out on many pelagic trips out of Hatteras and until this moment Fea's Petrel had eluded me.

(the not-at-all rare, but crowd-pleasingly cute) Wilson's Storm-Petrel


If you fancy your odds make sure to book in advance as the spring blitz trips always fill in a hurry.  See seabirding.com for more information.  For far superior photos of some of these birds by Mike Lanzone and Kate Sutherland's accounts, see the seabirding blog: Day 1, Day 2, Day 3.

For the first time on a pelagic, I followed ebird's suggestion of submitting a new checklist every so often while offshore.  I found this to be rather tedious at first, but it has its rewards.  Now I have a better understanding of the route we actually take on this trip.

eBird GPS fixes outlining the teardrop-shaped pelagic route

I was surprised to find that a few of the points outside the inlet actually landed in what ebird considers to be Hyde County, so I got a few unexpected county ticks for my trouble (Arctic Tern and three shearwater species). 

Tuesday, August 20, 2013

How to find a Trindade Petrel off Cape Hatteras


The Trindade Petrel (formerly considered to be a subspecies of "Herald Petrel" in the Pacific) is one of those scarce Gadfly, or Pterodroma, Petrels that is rarely seen by birders.  It has a few, small, remote breeding colonies off the coast of Brazil in the Southern Hemisphere and ranges over a poorly delineated, but expansive swath of Atlantic (and possibly Indian) Ocean.  There may be as few as 1100 mature individuals in existence and the IUCN lists the species as "vulnerable."

The odds for August suggest that it should take 5 or 6 all-day pelagic trips with Brian Patteson to get a Trindade Petrel, but this summer has seen more reports than usual off the east coast.  They have been more regular than usual on pelagic trips out of Hatteras and several have been recorded on NOAA seabird surveys.  This past weekend was my last chance to spot on one of Brian's trips in 2013 and I was psyched to read the teaser he posted on Carolinabirds midweek:

A front just came through and we now have northeast winds, which is usually the best for seeing Trindade Petrels here- better than the conditions we've had recently.

It's ballsy to predict a good trip offshore, especially days in advance, but if anybody knows about birds in the Gulf Stream, it's Brian Patteson.

Sure enough, the Saturday trip, with winds out of the north, was about the birdiest I had ever seen the pelagic ocean off Hatteras.  Shearwaters were all around the boat most of the day without the much in the way of a typical midday lull.  In fact it was just after noon when vindication appeared:
Trindade Petrel (intermediate)
Passengers were screaming and cheering and Brian was giving his petrel breeding call over the PA, which actually seemed to bring it in closer.  The bird gave us several close passes (usually a bird has to just about sit on the deck of the ship for me to get passable blurry shots like these). 

Trindade Petrel (same individual as above)



Trindade Petrels are polychromatic, meaning they have dark, light and intermediate color morphs.  The first and friendliest bird we saw appeared to be intermediate and we had a second dark bird appear about an hour later that I failed to photograph.

To address the post title, hope and pray for winds out of the north when you take your Patteson pelagic and you just might get a Trindade Petrel.  Even if you don't, you should have a better than average time birding.  That petrel was just one of the 14 pelagic species we saw, which is about as good as one can reasonably hope for!

Other excellent birds seen were a White-tailed Tropicbird (my 350th bird for North Carolina!), Long-tailed and Pomarine Jaegers, Manx Shearwater (uncommon in summer), and both Bridled and Sooty Terns.

Oh and we also had one more first for me: a Hammerhead shark!

Hammerhead (if you look closely you can see the head)

Unfortunately the winds shifted around to the south overnight and Sunday's trip didn't yield such exceptional diversity.  But we still saw all of the usual suspects: lots of Cory's, Great and Audubon's Shearwaters, inquisitive Bridled Terns, a few Wilson's and Band-rumped Storm-Petrels, great looks at Black-capped Petrels and the always cute Red-necked Phalaropes.

Bridled Tern looking a bit bald

Red-necked Phalarope

 Always cool to see shorebirds looking at home 20+ miles from the shore!


Red-necked Phalaropes
We did have a couple nice bonuses on Sunday:

A few Manx Shearwaters including one that sat on the water next to a couple Audubon's for excellent side-by-side comparison, and a distant Sooty Shearwater, quite uncommon off Hatteras in August.

Well, that wraps up a successful pelagic season for me.  Hopefully there will be more to come in 2014!

Check out the official trip report and some fantastic photos by Kate Sutherland on the Seabirding blog.  Brian has space on his trips this coming weekend.  More info at: http://www.seabirding.com/

Wednesday, July 10, 2013

Spotting for Bee Hives on the Gulf Stream

 I gaze over Gulf Stream waters from the bow of the Stormy Petrel II and see nothing but endless blue swells.  In the calm there are no birds nor creatures of any type to be seen.

As a spotter charged with finding birds for paying customers these famines can seem interminable.  There's nothing to do but keep scanning the horizons hoping to spot a distant feast.

Brian Patteson calls such bird swarms "Bee Hives."  Schools of tuna force baitfish to the surface, which attract ravenous flocks of shearwaters.  The arcing and swirling tubenoses on a distant horizon recall bees at a hive. 

Great and Cory's Shearwaters
 
With one spotted, Brian slams the boat into gear and we race toward the action, stumbling upon straggling, loafing, satiated shearwaters that allow close approach.
Audubon's Shearwater
Great Shearwater

 ...and reluctantly take wing.

Cory's and Audubon's Shearwaters

Cory's Shearwater

Over the two trips last weekend we found three "bee hives" of shearwaters some 35 miles from shore, and in one we found a ferocious hive queen.

South Polar Skua with Great Shearwaters
The South Polar Skua is a kleptoparasite, making its living by stealing fish from seabirds. Brian said he has even seen them kill shearwaters.
South Polar Skua
While we didn't witness a murder at sea, the bulky pirate was causing utter pandemonium among the flocks and committed countless larcenies.

South Polar Skua
Check out this video of the action.


The skua was my favorite bird of the weekend (now I just need to find a Brown Skua, and I'll have seen all the world's Stercorariidae), but there were many other highlights.

On Saturday's trip we had, per Brian Patteson, one of the top 10 Leach's Storm-Petrel trips of all time.

Leach's Storm-Petrel
Yeah, storm-petrels are tough to photograph.  They just don't hold still.  But for those with the proper combination of equipment, skill, and patience, this was an excellent trip for storm-petrel photo ops.

My Band-rumped Storm-Petrel photos are even worse than the Leach's shot above, but I got some decent Wilson's Storm-Petrel captures.
Wilson's Storm-Petrel
Check out those long legs!

Wilson's Storm-Petrel
A fortuitous find was a young Bridled Tern resting on a float on Saturday.
Bridled Tern

We saw one or two Bridleds on Sunday as well, plus a Sooty Tern.  These tropical pelagic terns are not very common off of Hatteras until August.

Finally, the smooth ocean made for some excellent marine mammal spotting conditions.  We had Bottlenose Dolphins riding the bow, several good sightings of Gervais' Beaked Whales, and saw four Sperm Whales!


Sperm Whale
The one we saw on Sunday was particularly friendly!

Sperm Whale

It was a fantastic weekend of pelagic birding.  Brian's spring trips are more popular because of the chance of better diversity, but in the summer the numbers of birds seen are generally much higher. The trend held true this weekend and we had plenty of space on the boat and hundreds of birds to see. 

Thanks again to Brian and Kate for having me along and to Kyle Kittelberger, who did a great job in his spotting debut. More info about these trips and the official counts and species list can be found on the Seabirding Blog; and additional (better than mine) photos here

Brian says there's room on most of the trips this summer; see www.seabirding.com/ for the schedule and booking information.