Sunday, 29 September 2013

Begin the spring

As autumn draws on back home the days are getting longer on Bird Island. The last week has seen snow, rain, mist and blue skies, though with tremendous wind speeds we pass through each of them several times a day.

Brown Skua taking advantage of a warmer spell when the stream melted to have a good wash. The skuas have returned in their dozens in the last fortnight.

As the island wakes up from winter my main field-work begins again.  

With the ground still too frozen to build nests the Gentoos spend their time preening, resting and quarrelling. 
In my last blog I talked about the returning penguins. Large numbers of Gentoos are now regularly on the nesting beaches, but there has been relatively little nest-building activity. With temperatures still regularly below 0C they can't pick up pebbles, sticks or bones from the frozen mud so they've had to be satisfied with longer courtship rituals (mainly bowing to each other) and wandering around getting distracted by snow and each others tail feathers.

Northern Giant Petrel. The proud owner of a new egg.
The bulk of my work now is with the Giant Petrels, the Geeps. There's a study area over the Meadows and each day I have to wander around looking for new nests and checking for any failures. I mark each nest with a stake and give it a number and record the location on GPS so I can create a map later.  

Southern Giant Petrels trying to create their own egg.
I try and get ring numbers for the birds and ring any unringed individuals, depending on how calm they are – with a beak superbly well adapted for ripping up dead seals and cetaceans they can and have inflicted some serious cuts and bruises to my hands and arms. The best protection during this sort of encounter is the leg of a welly (with the boot cut off) slid over the arm to act as a makeshift gauntlet. The ringed birds give us all sorts of long-term data including population changes, survival rates, chick-rearing success and long-term fidelity. One of the new nesters today was ringed as a chick in 1979, making her older than me. The old birds are generally more calm and relaxed and it's a privilege to sit near them eating lunch and counting how much we have in common (not that much was my conclusion).

Wandering Albatross chick sporting that 'mutton chop' look.
 Meanwhile, over with the albatrosses...

With their adult feathers showing through the down the Wandering Albatross chicks are keen to feel the wind blowing through their wings, even though it'll be a bit of time before they can fly.
As Steph's work ringing all the Wanderer chicks nears completion the first of the mollymawks, the smaller albatrosses, have returned and daily counts of them, along with more ring checking, have begun. The Grey-heads were first, followed by the Black-brows and the Light-mantled Sooties won't be too far off.

One of the first Grey-headed Albatrosses back at the colony.

And the seals?

The smelliest bean-bag you've ever seen.
As the craziness of the Fur Seal pupping season approaches Hannah is still recording Leopard Seal activity and desperately hoping for an Elephant Seal pup on Bird Island. There's a handful of enormous males on the beaches and a couple of females. We've got our fingers crossed.

Count the chins.
The Elephant Seals are amazing. They look like the sort of thing that used to exist a hundred years ago, before the Victorians wiped them out so we could just look at poorly-drawn sketches and think 'nah... as if'. As they don't really breed here we're not going to get to see any of those spectacular fights between males but seeing the sheer size of them, and of their mouths when they're bellowing across the bay, gives the place a sense of pre-human wilderness.

Deserving the name elephant.
In the midst of the Leopard / Elephant / Fur Seal watching there was even more exciting seal action with a second Weddell of the season. And this one was hauled out on Main Bay, far from home but enjoying the bitter weather.

Lovely small-faced Weddell Seal
Longer days mean heading out earlier is possible, and getting work done quickly meant we could be done in time to create cakes and costumes for Hannah's birthday.

New superheroes and villains: Lord Caveman, Jesus riding an Orca, Dr Hogface and Super Binman.


Jerry.


Sunday, 15 September 2013

Penguins Strike Back

The freezing cold gales bely the fact that spring is approaching in the south. Gentoo penguins have been around in small numbers all winter, but the breeding season is on its way and they need to find their partners and build up their nests. The last week has seen a huge increase in numbers coming ashore in the evenings to spend the night on their chosen beaches.


Out to sea there's an increased amount of splashing and black shapes are seen jumping between the waves.



They disappear from view and then, in an instant, there's an almighty splash and dozens of them emerge from the sea. Some leaping straight out, others scrambling, others slipping on the wet stones.


Once on the rocks they pause for breath and to check they're in the right place. One of the penguins in the above photo certainly is not.


One brave individual decides they're in the right place and starts off across the slippery rocks. There is an easier route, straight up onto the beach but it may be harder access under the water and it means finding a way past the fur seals. While they're not really a genuine threat to the gentoos, it's probably in their best interests not to antagonise them.



Negotiating some of those rocks is not so easy, particularly the slippery, algae-covered ones. This individual was pretty capable but more than one fell over and then climbed up slowly using their beaks for support.


Once the rocks are crossed there's the mass rush up the beach.


A few get delayed by the line of kelp - a confusing trap.


But all manage to head up to the nest site near the top of the beach.


Reunited at their nest. Gentoos are monogamous but pair-bonds rarely last more than a few seasons so there's plenty of courtship - birds bowing to each other individually or symmetrically - and starting to build up their nests.

It's still early in the season and there's ice all over the beach. That'll soon melt, giving them access to the nesting materials and they'll start to get underway seriously.

Jerry.

Saturday, 7 September 2013

Wanderer chick ringing

The Wandering Albatross chicks that hatched around the start of March have been sitting tight all winter, protected from the blizzards by huge amounts of fluffy down. Showing through that down now are good numbers of adult feathers, particularly on the wings, head and chest. Although they're still a few months off fledging many of them are able to stand up properly and will soon start walking, exploring the area around their nests.  

Wandering Albatross chick overlooking Bird Sound.
So this is the time for ringing them all. I've been out helping Steph as she covers the whole island, seeing to every one of the 500 chicks. The information we get back from these rings will provide information on survival rates, distribution, migration and breeding success of these huge, magnificent but endangered birds.

A sign of things to come...

I'd been out doing this and checking on the chick at the far end of the island on August 31st. I'd been told not to be back too late and when I returned I was allowed a quick cup of tea and shower before Hannah suggested we go for a walk up the hill. We headed up and over to the hut at Fairy Point from where I do the majority of my Macaroni Penguin work. There, Craig and Steph had decorated and warmed up some food and carried over a few beers – it was my surprise birthday meal! We had a good laugh and fought off the cold with tilley lamps and numerous cups of tea.  

Crammed together around the table awaiting dinner.
Over night it snowed heavily, so once we'd wiped the condensation from the window we could see white all around us. The skies had cleared for the journey back so we got some great views of the snow-covered island.

Cabin in the snow. Behind the 'Love Shack' is Big Mac, where about 40,000 pairs of Macaroni Penguins will soon return to breed. In front of it is Little Mac, where about 500 will.
Chating to the Geeps on the way back.
I returned for some beautifully made presents (framed picture, photo-book, knitted penguin) before we had a hot-tub and huge pizza. Brilliant.

Here's a few more photos of what's happening:

Antarctic Tern fishing in the bay. There's been quite a lot of terns about recently and with some low tides they're regularly seen fishing just off the beach, going for the tiny crustaceans and fish.

Average day of a Gentoo penguin; jump up on a rock, eat some snow, get confused how to get down from the rock.

Chinstrap penguin; an occasional visitor from a bit further south.

Pair of adult Wandering Albatrosses taking advantage of the rare opportunity when they both return to feed their chick at the same time to indulge in a bit of mutual preening and pair-bonding.

Leopard Seal hauled out on the brash ice for a rest.

Taking advantage of the super-low tide to do a bit of rockpooling.
Amongst the seaweed, sponges and anemones are lots of tiny crustaceans, hanging on among the swirling waves.
Always a pleasure to see - a nudibranch!
Jerry.

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