Sunday, 18 June 2017

Arctic Terns

You just have to admire the Arctic Tern, it travels more than 22,000 + mile a year as it flies from the Antarctic to Shetland and back each year, seeing more daylight than any other animal.


The Guardian newspaper claims that an Arctic Tern returning to the Farne islands in England clocked up  59,650 miles in one year, the longest migration ever. As Arctic terns can live up to 30 years of age they will clock up thousands of miles



Tern colonies in Shetland have been suffering for many years as adult birds have failed to find sufficient sandeels. The last two years have been better but so far this year i have only see a few terns with small fish- not a good sign.






Sea birds always like to bathe in fresh water and terns are no exception. Places such as Grutness, Scatness & Spiggie give plenty of opportunity and the birds gather together for safety



In 1980 a study (Bullock & Gomersall) revealed that there was 32,000 arctic terns in 369 colonies in Shetland. Numbers in 2014 are thought to be around 43% less than in 1986, for instance on Mousa in 2015, 300 Arctic Terns were present but on 20 pairs attempted to breed




On Noss in 2016, 72 nest had been recorded , the most in a decade. Only 5 chicks survived due to heavy predation from Skuas and gulls.


With 73% of Arctic terns concentrated in the Northern Isles , Shetland is an important place for all seabirds with 21 species breeding


Although this report does not contain information on Arctic Terns it is well worth a read

https://www.soteag.org.uk/files/2017/03/2016-SOTEAG-seabird-Monitoring-Report.pdf

This contains information on the beached bird survey i take part in

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Tuesday, 13 June 2017

Kittiwake

I do love to see Kittiwakes although in Shetland numbers have dropped dramatically as sand eels have become scarce. Sumburgh for instance had around 3,000 breeding birds about 25 years ago now they are less than 300. 

A study by M G Richardson in 1981 found 54,300  birds with Noss, Fair Isle,  Foula (estimates from earlier years )



The sound of Kittiwakes call are one of the highlights of visiting a seabird colony. Unfortunately this is becoming less common as numbers plummeted throughout the Shetland colonies. This is all down to the lack of food- Sandeels.

Its a complex food change, the food sandeels feed on  Zooplankton has reduced by 70% and this is down to the sea warming which has also affected the food Zooplankton feed on - Phytoplankton which is blooming out of sync. 

Kittiwake- Sandeel - Zooplankton - Phytoplankton

This is resulting in less  sandeels, this complex system is not helped by the fact that nutrient poor warm water species are now replacing the cold water nutrient rich Zooplankton. In addition sandeels are now feeding deeper down in the ocean which give less feeding opportunities to birds such as Kittiwakes which feed near the surface

They did have a slightly better year last year but i am interested to see whether this has continued.

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Thursday, 8 June 2017

Osprey

I decided to go down to Spiggie late yesterday afternoon as a Honey Buzzard had been seen in the area earlier in the day and it was a good a place as any to start



The weather didn't look too promising as i journeyed south, thick fog moving in and the wind picking up.


As i arrived at Spiggie, i found the area completely clear of fog but the wind had picked up from virtually nil earlier in the day


I searched the north side of the RSPB reserved first noting a pair of Mute swan and several Tufted, Mallard and Teal.


Moving slowly down the west side it was easy to see a number of waders close up with Curlew, Lapwing, Oystercatcher, Snipe,Dunlin,  & Redshank. Plenty of Greylag as  well with large number of Starling feeding in the fields.


At the southern end marsh i checked to look through a large flock of Tufted, over 95 present North - South. A female Goldeneye was a nice find and two Grey Heron resting up near one of the pools


Checking the fence posts a large raptor caught my eye, first i thought female Marsh Harrier but as it turned its head it revealed its self to be an Osprey. It had caught a fish and had virtually finished it 5 mins later.


Harassed but several Oystercatcher it decided to take off flying low south over the loch and finally ended up on the small beach which separated Spiggie from Brow marsh




It sat in the water for a while before flying back up the loch, by this time the wind had strengthened and it had become quite cold so i left after reporting it. This year has been very good for Osprey sightings in Shetland and this one a late bird, my first Shetland Osprey




This is more likely to be  a Scandinavian bird rather then one form the increasing Scottish population

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Tuesday, 6 June 2017

Oystercatcher

Oystercatchers seem to have a good breeding season and i have seen several pairs with young in the south mainland. These are known as Shalders in Shetland




Young birds tend to stay close to a parent and are taught how to catch worms






An intruder is chased away, the threat from Skuas and Gulls cannot be under estimated


Lapwings have not been so lucky with a large number robbed, Hoddie Crows been the main culprits


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Sunday, 4 June 2017

Spring continues

Although spring migration may nearly have come to an end, it is still an important time for the breeding birds in Shetland. With only around 75 regular species breeding here everyone becomes important.



                                       Male Wheatear, a stunning bird that is fairly common on the moorland

Skylark is reasonably common here unlike England where it has become very uncommon. Its great to hear them sing from the front door

Starling having one of its 5 a day, a very common bird in Shetland and very noisy


Blackbird is the commonest and only breeding thrush, apart from the odd Robin at Kergord



Willow Warbler and Chiffchaff still passing through the islands. More rarer warblers have been present these as few days with Blyth Reed Warbler at Sullom and Icterine Warbler at Sandwick and Scatness


It was good to see a party of 12 House martin with 6 Swallow at Sumburgh Head. Also here a female Bluethroat, no photos but four reasonable views among the roses.


6 Long Tailed Duck at Scatness (5 above), more common spring and summer visitor 15 years ago


Still hoping for late Spring migrants with Marsh warbler, Red Backed Shrike and possibly Bee eater.

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