Showing posts with label skua. Show all posts
Showing posts with label skua. Show all posts

Wednesday, 20 June 2012

Two Years of Wildlife in the Outer Hebrides

My camera gear gets a pretty rough time when I take it out in the field. If I’m not at the coast on sandy beaches or gloopy mudflats, I’m usually out on a boat of some type in every kind of weather Scotland can come up with. From 2007 to 2010 I spent some time working with some of the trawl fishermen based in the town of Stornoway to study the bycatch (any non-target species) in their catches and to try and figure out ways to make the fishery more sustainable. As a result, I’ve spent quite a lot of time at sea on a couple of the boats which, although it’s been pretty challenging at times (largely depending on the weather!), has also been an amazing opportunity to get up close to a huge variety of Scotland’s marine life amongst some of the most gorgeous scenery in the country!


The area I was working in is called the ‘North Minch’. The Minches are the bodies of water that lie between the northern islands of the Outer Hebrides (Lewis & Harris) and the Scottish mainland, and is approximately the area shown in red on the map below. As with most of the Scottish west coast, this region supports an extremely rich marine community and while I have not yet had the chance to go diving here, the evidence for it from the surface is clear from the numbers of seabirds and marine mammals we saw on each trip. The trawls themselves also gave us a glimpse of some of the underwater life and many of the images in the Marine Identification gallery are of animals caught in trawls from the Minch.

Map showing approximate area of the North Minch
(Image from WikiMedia Commons)

The wildlife you could expect to see in the Minch, as with anywhere, varies throughout the year, and after two years and over 300 hours at sea out there, we were able to piece together a picture of the common species you may expect to see at sea around the Isles of Lewis and Harris over the course of a typical year. Hopefully if you ever visit the islands this will help give you some idea of the wildlife that is around, and that you may be able to see if you explore the coastline from either the land or the sea. Wildlife-spotting boat trips are available on Lewis as well, so you don’t need to brave the fishing boats to get out and see it all!

Spring
Springtime is definitely the season when the wildlife is beginning to warm up in preparation for the summer. The seabirds begin to appear again in force after the winter and the gannets always seemed particularly keen to follow the fishing boats during the spring months, possibly because they provided enough food to tide them over until the plankton bloom brings the shoals of small fish in. Whatever the reason, the gannets were out in force every spring we visited which made it that bit easier to get some good action shots of them.




Gannets are one of my personal favourite birds to photograph, although it took a LONG time to finally get a series of diving shots that I could really be proud of.

A kittiwake displaying its winter plumage

Kittiwakes were always close behind our boat, and many of the young ones were still in their 1st winter plumage. Fulmars and several of the larger species of seagull (like greater and lesser black-backed gulls and herring gulls) were also common around the boats.

Gannets followed the trawlers in high numbers in the spring 

The weather in spring is still cold and the sea state can be fairly unpredictable this early in the year, although the Minches are somewhat notorious for their rough weather anyway! This did mean that it was generally more difficult to spot cetaceans (whales and dolphins) or seals – no doubt they were around, and we did occasionally catch a glimpse of the odd porpoise or get a visit from a scavenging grey seal, but they were fairly few and far between. If you’re looking for marine mammals, wait for the summer! 


Grey seals occasionally made an appearance around the nets, but sightings outside the harbour were a rarity
The unpredictable weather did mean that we were land-bound on a couple of days which gave us a chance to see some of the island and take in the stunning white beaches and rocky coastlines that the Hebrides are famous for. They are not called the ‘jewels of the sea’ for no reason, and a tour of the coast is well worth it. As far as the coastal wildlife went, we saw dunlin, ringed plovers, oystercatchers and a variety of gulls on the sandy shores, along with colonies of fulmars and cormorants and shags on the rocky cliffs to the north. And all that in just a few hours – a more thorough exploration would undoubtedly throw up a lot more.

Rain coming in over Broad Bay (Isle of Lewis)

Ringed plover on the shore

Summer
Summer is probably the busiest time for wildlife and the best time to visit if you are looking for a variety of species and relatively settled weather (at least as settled as Scottish weather ever gets...!). Summer is really the time to see cetaceans, and the Minch is full of them – on our various trips we were lucky enough to see harbour porpoise, common and bottlenose dolphins and minke whales, and we even saw a baby minke whale breaching clear of the water right next to our boat in 2009! There was no chance of getting the camera in time, but it was an amazing thing to see! Getting calm weather massively improves your chances of seeing cetaceans so try and pick a settled day for it if you can, though I’ve noticed that seabirds tend to prefer a bit of wind to fly about in and tend to sit on the surface on calm days. If you’re after birds in flight, a bit of a breeze is a good thing!

Common dolphins playing in the water around the boat.

The gannets, gulls, kittiwakes and fulmars are still around at sea, although there appeared to be much more ‘natural’ food in the Minches during our summer visits and the gannets, while still present at the trawlers, were typically seen in far higher numbers feeding on baitballs along the coast. Summer is also the time to see great skuas which are summer visitors to Harris and Lewis (and the Orkney and Shetland Isles). These are powerful birds which are capable of attacking and bringing down birds as large as gannets in order to steal food from them (a practice known as kleptoparasitism) or simply kill them. While we were there in summer 2010 there were quite a few of these encounters, some more grisly than others, but which made for pretty interesting behaviour shots! We had rare sightings of various shearwaters as well, although these birds often stayed too far away from us to identify clearly. These are offshore birds which only return to their burrows on land during the summer breeding season and at night, making them a fairly rare sighting unless you are able to travel relatively far out to sea.


A great skua chasing down a gull.

A great skua in flight alongside our vessel.

A lesser black-backed gull coming in to land on the sea. 

As well as the large predatory and scavenging seabirds, many of the smaller auks were also around, including puffins, guillemots, razorbills and black guillemots. We saw the largest groups of these around the South Shiant islands, which can be visited with some of the wildlife tour boats operating from Lewis.

Autumn
As the autumn comes in, the weather begins to deteriorate again and although it is not as cold as in spring, many of the seabirds start leaving the area, particularly the puffins. Gannets did not seem to be around in such high numbers as in the summer either, although the great skuas were still present during one of our visits in September, as were small numbers of sooty shearwaters. Unfortunately, the weather during our later trips was awful, and I wasn’t able to shoot much. To be honest, I wasn’t able to do much of anything on those days except count the minutes back to land!

A sooty shearwater resting alongside our vessel.

Winter

A gull taking flight over a golden sea at dawn

Winter in the Minch is freezing cold, dark for all but around seven hours of the day and has a tendency to get quite stormy! Having said that, it is a beautiful time of year to enjoy the scenery of the Hebrides and the dawn light is wonderful. By this time many of the birds have moved on, leaving mainly gulls and kittiwakes behind and a few cormorants. There are herons in the harbour and town centre of Stornoway, and we also saw red-breasted merganser in the harbour in February 2009. There is far more light in February than in December once you get as far north as Lewis, and February is generally good for photography if you can dress warmly enough!

Lighthouse at dawn travelling out of Stornoway harbour (taken around 8.30am) 

Young kittiwakes in their 1st winter plumage are a common sight at this time of year 

Dawn over the Scottish mainland. There are far worse sights to see as you start your day!

One place you should always check out though is the harbour, which is home to a resident group of about 10-12 grey seals, which will come in and feed on any discarded catches when the fishing boats come in each evening.

The grey seals in Stornoway harbour are quite happy to eat any waste fish the boats throw away 


Summary
I have no doubt that I have only seen a tiny amount of the marine wildlife that lives on and around the Hebridean Islands, and I suspect it would take a great many more visits to produce a comprehensive listing of everything that lives there! However, hopefully this guide will be of some use if you are planning a trip to the islands and want to see some of the wildlife for yourself. If you would like more information or have any questions about any of my sightings or photographs please don’t hesitate to get in touch at info@wildoceanphotography.com

Friday, 8 June 2012

Plankton blooms, Strange birds and More Macro Photography


Well, we left Rockall trough yesterday and moved to a shallower site further north on Rockall bank to try and escape the storms which are swirling around the south of the UK at the moment, which seems to have been a good move as we’ve managed to get some good, long ROV dives out here so far!

Interestingly, we seem to have arrived right in the middle of a coccolithophore bloom which has turned the water a tropical milky green colour! Coccolithophores are a type of phytoplankton with a calcium carbonate skeleton, and are one of the most obvious blooms to see using satellite imagery because they are such a bright green.


A coccolithophore bloom has turned the water bright green

We’ve also had a few interesting bird visitors lately. I’m not actually sure the bird from the last blog really was an arctic skua, and we were visited by a yet another skua two days ago which I’ve not seen before. I've no idea if they're the same species with different plumage or are completely different, so if anyone can help me out it would be greatly appreciated! We don't have a particularly good ID book out here so getting these right at the moment is more or less guess work.

Another mystery skua passing by the ship

I also spotted this little fulmar amongst the crowd, showing very different colours from normal, but I don’t know if it’s just a young bird or on in winter plumage? I’ve not seen fulmars in different plumage before so any help would be much appreciated!

I've never seen a fulmar with this plumage before. Is this common or something weird?

With the return to ROV dives we’ve also had some more guests for the photography aquarium. To get around the issue of the unbalanced lighting I made a homemade reflector out of tin foil and a random piece of plastic and it seems to be working pretty well so far. See what you think of these:

A little squat lobster on a hydroid. 

The hydroid itself was full of little amphipods (crustaceans similar to sandhoppers)

Eunice norvegicus is a polychaete worm which builds its tubes inside Lophelia reef framework.

A gorgonian (a type of soft coral) commonly seen growing in Lophelia framework

A tiny crinoid or feather star, found clinging on to a little piece of coral.

We're heading off to the Hebridean Seamount tonight which means we're heading back towards the Outer Hebrides and land and starting to meander homewards. We'll be passing Rockall itself this evening at about 9pm, so we'll hopefully get there for sunset (if the clouds lift a little!).

Monday, 4 June 2012

200 hungry seabirds & the Jubilee


Well, the weather brightened up yesterday and the swell has decreased pretty nicely so it’s looking like we’ll be back on track with the ROV work from today which is good news! Still it’s been pretty cool out here with the heavy weather and although there hasn’t much going on in terms of wildlife that we could really see (except the pod of 20 pilot whales which I missed! Bah!).

Making celebratory Jubilee hats

The bad weather did give us a chance for some hat-making sessions for the Queen’s Jubilee weekend though!

What are you looking at?

Considering that there are 54 people on board the ship, we throw away relatively little food. Meals are one of the daily highlights so people tend to eat everything they’re given anyway, and the kitchen will recycle any other leftovers into new meals for a few days as well so very little is actually wasted. So it’s pretty incredible that we’re currently being followed by an entourage of about 200-300 gulls, fulmars, gannets and skuas, which are apparently getting enough food to make it worth their while to tag along with us. I’ve no idea how much these birds need to eat, but I would have thought a fishing boat would have made a better target for discards and a free meal than us. Still, it means that feeding time for us is quickly followed by feeding time for the birds which inevitably means a few scuffles between the birds and some good photo opportunities for me!

We're being followed by a LOT of birds

This must be worthy of a caption competition!

Fulmars racing for some scraps

Two gulls scuffling over some leftovers

A (far away) skua intercepting a gannet mid-dive.

 I saw my first shearwater of the trip today too, which is nice since it means they’re definitely out there somewhere! I’m still trying to get a good photograph of one, but they’ve been making themselves scarce this trip which is a bit unusual considering they’re usually a fairly common sight. Still, I’ll keep an eye out for them and hopefully they’ll come back over the next few days before we leave.