One of my main tasks in my first week on Ramsey Island has been helping with the Manx Shearwater survey. ‘Manxies’ are long-distance travelling seabirds which return to breed to the coasts on the western side of the British Isles each year, after spending the Northern Hemisphere winter off the eastern seaboard of South America.
These burrow-nesting birds were severely affected by rats on Ramsey but the eradication of the rodents 15 years ago has enabled the number of Manxies to slowly recover. The last survey in 2012 found 3,835 nesting pairs, and in 2016 it is hoped that numbers will have increased significantly.
Following a survey of suitable nesting burrows earlier in the year (before the growth of bracken across the island made it much more difficult), the main survey involves the playing recordings of male and female Manxie calls down the burrows to check if any are ‘home’. My small role in the surveys was to help find the burrows into which the calls were then played. With the surveys now complete, the Island’s wardens now need to work out exactly how many Manxies are now breeding here.
It’s not just when undertaking the surveys that the sound of Manxies can be heard across the Island. One of the most memorable aspects of a stay on Ramsey is listening to the giggling and gurgling calls of the birds as they fly into their burrows near the volunteers’ Bungalow home. The birds only come to land at night, so the calls are an erie accompaniment to many a night’s sleep.
In addition to the natural burrows that the Manxies use for nesting, the wardens have installed a number of artificial nests and another task was to check whether these were occupied. While doing this, the wardens take the opportunity to ring individuals as part of their research and I was lucky enough to be there on one occasion during this stay – and even got to handle one!
One evening Manxie activity is to go out to the western side of the island at dusk to see the thousand upon thousand of these birds flying southwards, skimming just above the surface of the sea, to the much bigger colonies on the nearby islands of Skomer and Skokholm.
This link to the RSPB website provides a bit more information on Manx Shearwaters including a recording of their calls.