Showing posts with label jerry. Show all posts
Showing posts with label jerry. Show all posts

Friday, 14 March 2014

Wildlife update 1: Penguins

Gentoo Penguin

Having started to hatch just before I left, it was pleasing to return to see good numbers of large Gentoo chicks covered in dense down. This has been shed as their adult feathers poked through and by mid-February most of them had explored the edge of the sea. This tended to take the form of wading into the sea to about waist depth, falling forward and flapping wildly on the surface. They'd try a few dives but at first most are carrying too much body fat so just flail on the surface. That doesn't last long before they turn and run back onto the beach where their less adventurous pals stare at them like they're expecting tales of the wide ocean. With time the fat is replaced with muscle, helped by vigorous flapping on the beaches, and they start to venture a further and further into the water, diving and chasing each other around.

Taking a break during gentoo chick counting for a quick lie down. This curious chick, almost fully moulted but with a little down left on the back of the neck and the flips, was curious enough to wander over and try to remove my glasses.

Throughout all of this they are still being fed by their poor parents. The adult exits the water and walks up the beach calling. It doesn't take long before one or two chicks, frequently the same size as the parent and often fatter, come charging toward it. The adult turns and runs, often heading right down to the waters edge before allowing its young some food, hopefully a belly-full of regurgitated krill. The running away from the chicks draws them closer to the water, maybe an encouragement that they should be out feeding themselves. It also ensures the fitter, healthier chick, the one that can keep up, gets fed first; an important strategy to maximise the chances of success in a lean season.

Young penguins enjoying the wave pool - one of the more sheltered bays - before they head for the open sea,

My work with the Gentoos has mainly been to count the number of chicks in all the colonies. With approximately 4,000 on the island they have had a reasonable year. Chick health is roughly worked out by weighing them (not all 4,000). By comparing numbers and weights to those collected every year for the last few decades we can look at long-term trends in these species that are key indicators of the health of the whole Southern Oceans.

An adult being harasses for food by its two strapping chicks,

There is another, even more glamorous part to my job with the Gentoos. A few evenings after dinner I donned latex gloves, took some bags and a spoon and headed over to Landing Beach. There I positioned myself near the colony, with a good view over many adults.
I wait with baited breath for this one moment.
Over to the left! It happens! A penguin does a poo!
Brandishing my spoon I hurry over before the Sheathbills can get to it and scoop up as much of the poo as I can, putting it in a little bag which I seal and put in a larger bag.
Back in the lab I will label and freeze this before returning it to Cambridge.



Me barely able to contain my excitement at a particularly good bit of gentoo poo. (Hannah's photo).

Rather than some weird, long-range-mail based campaign of abuse, this is part of an experiment to try and determine Gentoo diet through isotope analysis.


Macaroni Penguins

Like the Gentoos the Mac chicks have also gone from small balls of fluff to fat balls of fluff to sleek swimming machines. Where the young Gentoos get to splash about a bit in the shallows that's not really an option for the Macs as, with big waves breaking against the steep rocks, getting in and out is an art form that the adults often fail, getting washed down the big beds of kelp.

A creche of fluffy young penguins with a few adults on guard around them.

A fairly young Mac (note the short eyebrows) wearing a sort of body warmer made out of its old, unmoulted feathers. 

Counting and weighing the chicks is again the priority in terms of monitoring but there's several non long-term projects that I've been getting up to. One recent one is observing behaviour during moulting, which is nice as I just sit and watch the colony for a while, recording how often the birds preen themselves and how often they preen their partner.

A whole load of jumping Macs heading back for the colony.


"You've got to fly like an eagle... leap like a salmon... etc..."

The scramble to get out when a good wave gives you a leg-up.

The one that mis-times it ends up frantically paddling upstream while moving down.





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.

Please support our work by visiting Hannah and Steph's blogs too.









Thursday, 6 December 2012

Shags and 'bergs.


A really good day today as we went to explore the east side of the island – the far less studied side and with being so busy elsewhere I'd not had a chance to get over. We had our legitimate reasons though – I'm starting to map the Blue-eyed Shag colonies and Tamsin needed to check on the rat bait boxes (we have to be constantly vigilant about the possible presence of rats as they could totally devastate the bird life if they ever found a way over). So Ruth agreed to take us on an expedition to Farewell Point.

Whereas most of the walking on Bird Island is through very high Tussock Grass, on the way out we went quite high so were able to use the more mountainous tracks.

Toward the east point it started to snow, heavily. By this point we were looking for Shag colonies, and looking through binoculars was like peering up close at a snow globe. But the weather here is predictable in it's inconsistency and shortly afterwards the clouds moved over and we were able to climb onto the ridge and eat our lunch in glorious sunshine.

From up there we saw the most exciting thing of the day; icebergs! Two of them basically on the horizon but still looking huge, square, bright white things. Also out there was the JCR, the ship we'd come down on. It was completing it's return journey and science cruise after dropping others off at Signy.

The sun held as we returned closer to the coast where the walking was harder, like most of the rest of the island. Thankfully there were plenty of spots to rest and take photos of penguins and seals. The distance from us to South Georgia mainland looked minimal – 100m or so of clear blue water. Of course the water is freezing cold and with a powerful tide. Then if you wanted to get to civilization as it is on South Georgia it's another 50 miles over some huge, barely touched mountains.

So I think I'll stay here.

Jerry.

 Blue-eyed Shag; one of those of that which we was trying to see.

 After the brief blizzard the clouds lifting to give us ghostly views of South Georgia.

 A short time and a short climb and we're counting Shags from the ridge.

 That massive white thing on the horizon is an iceberg. Even with a zoom lens it would be tiny but with a 16mm it's just a collection of pixels.

Grey-headed Albatross in front of Middle Mac (more Macaroni Penguins than at Little Mac, but not as many as at Big Mac).

 Tamsin and Ruth heading out along a well-established path across the scree. So much easier than through the tussocks.

Gentoo Penguins with some chicks almost big enough to be left alone. South Georgia looking imposing again in the background.

Looking back on Mountain Cwm and South Georgia.


More photos here.

Thursday, 22 November 2012

The Journey South


Sunday 11th November, 4pm. Half the BI team (Tamsin, Hannah and I) gather in BAS HQ in Cambridge and get on the minibus. On the way we think it's really funny to send Steph a massive long list of things we've forgotten and ask her to pick them up (bread, cheese, balsamic vinegar, watermelon, socks, shower cap, fax machine, stepladder, bowling ball and shoes (x2), christmas tree... you get the idea).

By 8pm we're at Brize Norton where we meet up with Steph (who hasn't got our requests) and Craig, who we've only just met there and then. By 11 we're on the plane and heading South, enjoying their cheap and nasty drink and meals along with the handed out iPads.

Monday morning. Two hour stopover in Ascencion while the plane refuels. We spend this time standing around inside 'the cage', a fenced off bit of tarmac preventing us going anywhere while the low cloud prevents us from seeing much of anything. Still, we try and enjoy our last bit of warm weather.

Monday afternoon. Arrive in Falkland Islands and discover if anything it's even warmer here! Our journey Stanley is by another minibus, this time one that loses part of the side of it half way along the big dirt track. In Stanley we get straight onto our ship, the RSS James Clark Ross (JCR). The cabins are comfortable, there's three 3-course meals a day and the bar prices are incredibly low. After a meal onboard we head into town and find a pub full of British flags playing 80s tunes on the video jukebox.

A broken bus in the Falklands

Tuesday. We were due to depart in the morning but plans change and we get an extra day ashore while they test the lifeboats. After various safety and evacuation drills we again headed into Stanley. As with yesterday it takes us ages as we're stopping all the time to look at the gulls, vultures, ducks and a few dolphins. It was still really hot so we grabbed lunch from the supermarket and sat with an ice cream under the whale-bone arch. After a little gift shop browsing we were about to head off to find a penguin beach when a landrover pulled up and it's occupants informed us we had to be heading back to the JCR.
Looking towards Stanley

The whale-bone arch in Stanley, with us posing near it, thinking about ice cream.

The ship had to pull away from the jetty to allow another, with a medical emergency, to come in. So we went and sat in the bay for a while. From up on the top deck, the 'monkey deck' we could see everything around us – Fulmars and Giant Petrels especially. Just before tea we spotted the tiny, black and white, Commerson's Dolphins feeding very close in. Me running round and Hannah screaming was the first of our daily tellings-off for being over excited. The day signed off with a partial solar eclipse.
RSS James Clark Ross

Wednesday. After what seemed like an eternity of lifeboat drills we finally headed off. As we pulled out from Stanley we could see a group of penguins, probably Magellanic, on a distant beach. We were also joined by our first albatrosses – Black-browed – but all too soon ran into a big bank of wet fog. Later that evening we got our first Wandering Albatross, standing out as being absolutely massive, even amongst all the other huge birds.

Black-browed Albatross

Thursday and Friday. Daily life on the boat consisted of getting up for breakfast, going out on the monkey deck to look at the birds, tea break, birds, lunch, birds, tea break, play a game or something, birds, dinner, birds. It was a nice crossing with only a small feeling of sea-sickness mixed with the lethargy from taking anti-sickness pills. On the Friday evening, after having Light-mantled Sooty Albatrosses flying close most of the day, we saw our first seals. Out on the moneky deck we looked down at increasing numbers until we came across a feeding frenzy that must have contained 300-400 individuals, all popping up, diving and porpoising through the water. Shortly after we passed them there was a distinctive whale-blow in the distance, followed by several more closer in and finally a (probably Minke) whale surfacing just in front of us.

Pair of Light-mantled Sooty Albatross in a brief synchronised display flight.

Saturday. We'd been up on deck in the morning looking out for land, but gave up because of snow, fog and cold. Then, about 11, someone came into the bar and announced 'we're there'. Bird Island looked ominous and intimidating – low cloud with steep, snow-covered slopes leading up into it. The five of us, plus our luggage, were taken ashore in the little Humber ribs to meet the current occupants, those who'd just over-wintered; Ruth, Jon, Jen and Rob, as well as Jaume who'd come down a month earlier. We were shown around base and tried to settle in as the excitement welled up at seeing the beach covered in male Fur Seals (a few females and even a few puppies close by the jetty), Gentoo Penguins (and one ill-looking King) standing around looking confused and various albatrosses circling overhead. The captain decided it was too rough to do any real unloading so were had the afternoon to get to grips with our new home, an afternoon during which the sun came out and we were able to enjoy and gin and tonic on the jetty.
Welcome to Bird Island: (l-r) Hannah, Jaume, Jen, Steph, Ruth, Craig, Rob, Jon.
(kneeling) me, (setting up her camera so absent) Tamsin.

Jerry.

It's a very small amount of internet we've got here so I won't be putting up too many pictures on the blog. Instead I'll try and regularly post some here.