Bardsey's Wildlife

Saturday 23 May 2020

The weather today was much the same as yesterday, with 40mph winds coming in from the south-west. Because of these favourable conditions, George and Sam decided it would be a good opportunity to head to the North End hide to do some seawatching. As expected, the strong winds brought many of the seabirds close to the shore and it was a good chance to get close-up views of species such as Manx Shearwaters, Fulmars and Gannets. Totals from today’s seawatches will be at the bottom of the post.

Oystercatchers from the North End hide

Fulmar past the North End with Guillemots in the background

Manx Shearwater

Gannets were flying in nice and close today

Hundreds of auks were flying close by too, including mixed flocks of Razorbills and Guillemots such as this

After a couple of hours in the North End hide, George and Sam headed down the West Coast the strong winds made it difficult to walk, almost having to stop to regain balance at some points. As is often the case in strong winds, small birds weren’t out in big numbers, but one nice surprise that was seen along the West Coast was the year’s first fledgling Wheatear. What’s more, just a little bit further south along the West Coast the year's first two fledgling Pied Wagtails were also recorded.

Juvenile Pied Wagtail on the Narrows

Juvenile Rock Pipit on the South End

In the afternoon, Sam decided to brave the wind and go and annoy some more Manx Shearwaters with the burrow census. The wind does make it hard to hear and so the work was slower as you really have to get your ear in every burrow to listen for any responses, but one wall was completed which contained 69 burrows. Not bad, but it is far easier to move quickly along the walls when the weather is calm!

The wind had died down significantly by 17:00, and a quick walk through Nant produced three Spotted Flycatchers, one Robin and two Collared Doves, along with a few of the species that you would expect such as four Goldfinches, four Blackbirds and two Chaffinches.

The evening was spent having a curry night and watching a film with Steve, Emma and Connor (the reason this blog is being uploaded this morning rather than last night!) it went on until the early hours and we all ate far, far too many onion bhajis…

Sightings today include: 3589 Manx Shearwaters, 178 Gannets, 469 Kittiwakes, 18 Fulmars, 1000 Guillemots, 600 Razorbills, 20 Swallows, four House Martins, 10 Stonechats, 12 Wheatears, eight Choughs and ten Linnets.

Once again, wind prevented any ringing today!

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Click to see inside!

Edited by Mike Archer, Mark Grantham, Peter Howlett and Steve Stansfield and published by T & AD Poyser, this fabulous book describes how much has changed since the first edition of Bird Observatories in Britain and Ireland was published in 1976. There are detailed accounts of the history and work carried out at each of the 18 observatories, with personal accounts by wardens and staff of the excitement of discovering a rarity, watching thousands of migrants attracted to a lighthouse after dark, and the pleasure and experiences that working at some of the country’s most remote and beautiful locations can bring. Click the picture of the book to see inside or to buy your copy.

Migrants

Being sited on the main migration route of many species, Bardsey (or Ynys Enlli in Welsh) is a well-known site for migrant birds, turning up many scarcities and rarities, as well as large numbers of common migrants. The island’s list now stands on 326, after the recent addition of Citrine Wagtail in October 2012.

Although Bardsey’s reputation for rare birds may not quite match that of some observatories, it is almost certainly the best site in Wales for rarities. Among Bardsey’s rarer visitors are the first Summer Tanager (1957) and Yellow Warbler (1964) to have been recorded in Britain and Ireland, as well as American vagrants such American Bittern, Sora, Kildeer, Spotted Sandpiper, Grey-cheeked Thrush, American Robin, Song Sparrow, Dark-eyed Junco, Red-eyed Vireo, Black-and-white Warbler, Common Yellowthroat, Rose-breasted Grosbeak and Blackpoll Warbler. To add to this impressive list of rarities, Black-winged Stilt, Lesser Yellowlegs, Lanceolated Warbler, River Warbler, Western Orphean Warbler, Booted Warbler, Blyth’s Reed Warbler, Eyebrowed Thrush, Thrush Nightingale, Red-flanked Bluetail, Isabelline Wheatear, Black-eared Wheatear, Collared Flycatcher, Blyth’s Pipit, Pine Bunting, Rock Bunting, Yellow-breasted Bunting and White-throated Sparrow have all been recorded.

Besides the rarities, Bardsey regularly attracts large numbers of weary migrants during 'fall' conditions in Spring and Autumn, largely a consequence of the fully operational Bardsey Lighthouse. In 2011, for example, a single grounding of migrants resulted in over 1000 Willow Warblers making groundfall on the island in August. In the not-so-distant past, a single attraction of 40,000 Redwings occurred in late October at the end of the last century.

Breeding birds

Bardsey is home to some 26, 000 pairs of Manx Shearwaters, which can be heard on dark nights from mid-March to August. They breed in their excavated burrows, which are scattered all over the island. Chough is the most important species of conservation concern, with between four to eight pairs nesting around the coastal cliffs most years, and a wintering flock of up to 50 individuals. A pair of Peregrines breed on the island, and a 1-2 pair of Ravens also nest most years. There are several species which nest only occasionally, such as Sparrowhawk and Little Owl, along with Afro-Palearctic migrants like Sedge Warbler, Blackcap, Chiffchaff and Willow Warbler. Up to ten pairs of Stonechats can nest in the isolated gorse patches around the island, along with many Linnets and Meadow Pipits. Corncrakes were once a common breeder on the island, although since 1970 there have been no confirmed pairs nesting. In recent years the likes of Lapwing, Yellowhammer, House Sparrow and Starling have also all become extinct as breeding species. In contrast, Shelduck, Puffin, Long-eared Owl, Grasshopper Warbler and Goldcrest have been added to the breeding bird list since 1998.

Ringing

Ringing is a very important part of the observatory’s role on the island. Since 1953, the observatory has ringed over 315,00 birds of 198 species. The highest number ringed in a single year was 1988, with a total of 11, 301 birds ringed of 93 species. There have been many days in the observatory’s history when several hundred birds have been ringed in one day; these occasions have mostly involved breeding seabirds, although these numbers can also easily occur with migrant species.

Lepidoptera

A total of 561 species of moths have been recorded on the island. Bardsey is not an overly good location for scarce moths, although the existence of Thrift Clearwings (Nationally scarce) has been established on the Thrift plants around the coast in recent years, after first being recorded in the years 1980 and 1996. Migrant moths arrive in small numbers every year, for example the annual arrival of Hummingbird Hawkmoths in the autumn; rarer immigrants in the past have included Death’s Head Hawkmoths, Vestals, Crimson Speckled and Red-necked Footman.

In recent years, a greater emphasis has been placed on recording and identifying the so-called ‘micro-moths’, which has resulted in the finding of 41 new species for Bardsey since 2011. In 2012, the coastal subspecies of Eana penziana (E.p.colquhounana) was re-found on the island, which was the first time that this Nationally Scarce species had been recorded on Bardsey since 1966. Apotomis semifasciana is also amongst the scarcer species of micro-moths to inhibit the island (also Nationally Scarce).

Butterflies are present on the island in small numbers, with species such as Common Blue, Small Copper and Small Tortoise-shell being the most common. A scarcer breeding species is the Grayling, which can be found in small numbers on the top of the mountain. Migrant butterflies such as Painted Lady can arrive in their hundreds, although other migrants such as Clouded Yellow and Dark-green Fritillary are quite rare.

Bardsey's Wildlife

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Saturday 23 May 2020

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