Bardsey's Wildlife

Sunday 14 October 2018

Following yesterday’s less than suitable weather today turned over a new page. A calm north-easterly airflow hit the island throughout the day, and clouds parted to reveal a sunny day. With change-over finished we sat on the porch for no more than a few minutes, before the first highlight of the day revealed itself. A group of three large white birds coming in from the South originally appeared to be Little Egrets, but as they approached the Wetlands of the island, it became clear the top bird was actually a CATTLE EGRET! Whilst in recent years they have slowly become an ever-commoner species in Britain, to the extent now that they have begun to breed, this Mediterranean visitor represented the first record for our little island! The species has been a much predicted first for Bardsey, but it wasn’t until today that the barrier was eventually broken down, presumably as they continue to colonise Britain they will become a commoner occurrence.

The day proved to be a bird filled one, and the supporting cast was nothing to turn your nose up to. A Water Rail was again squealing from the Withies, and four Snipes were flushed from the Wetlands. The usual waders remained on the beaches and were joined today by a Common Sandpiper which set hearts racing, but disappeared before a certain ID could be made. Sea passage was made up of c.2000 Kittiwakes which piled through off the South End this afternoon. Otherwise, over the land a little vismig culminated to 30 Skylarks, one ‘flava’ Wagtail and one Grey Wagtail. Dunnocks and Robins increased in number with 18 and 24 seen respectively. A Redstart graced the Plantation and some 12 Blackbirds today were clearly new in. Among the warblers today were four Blackcaps, 18 Chiffchaffs, 15 Goldcrests and a Firecrest, however the star of the day went to the three Yellow-browed Warblers recorded today, with this little gem eventually starting to begin to inhabit the island. The Spotted Flycatcher remained at the Plantation, and tit numbers remained stable with three Coal Tits, two Blue Tits and six Great Tits seen. A Treecreeper showed well at the Plantation, and a group of 194 Starlings roamed the island. Some more early finch passage resulted in 21 Chaffinches, one Brambling, four Siskins and six Lesser Redpolls. Finally a Reed Bunting was heard calling from Cristin in the early hours.

Bardsey's first Cattle Egret in 66 years of recording

Treecreepers are a scarce passage migrant through Bardsey, just two birds were seen in 2017

One of the first of hopefully many Yellow-browed Warblers to come this October

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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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Sunday 14 October 2018

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