Bardsey's Wildlife

Monday 11 October 2021

A light northwesterly breeze in the morning with clear skies had hopes of some good birds quite high.

The nets at both Cristin and Nant were opened, but failed to produce much at all. Bird of the day went to a real Bardsey MEGA... Jeff found a Nuthatch in Cristin Withy mid-morning. The bird moved rapidly north and headed off towards Plas Withy before anyone could get down to see it. Unfortunately it was lost to view and we were unable to re-find it.

Nuthatch all images (C) Jeff Wragg

Five Teals were on Pwll Gareth, with 17 Mallards on the West Coast. The clear blue skies proved to be irresistible for raptors moving over. the island, with the usual two Peregrines joined by two Sparrowhawks, nine Buzzards, a Kestrel and a Merlin and topped off with two smart Red Kites circling over the obs garden mid-morning.

Red Kites

As well as the regular eight Moorhens, two water Rails were heard sharming in the withies.

Two Lapwings were on the South End and two Snipes were in the wetland areas. the high tide wader roost comprised 55 Oystercatchers, nine Purple Sandpipers, 78 Curlews, six Redshanks and 31 Turnstones.

Gull numbers were much reduced with two Mediterranean Gulls the highlight amongst the 75 Black-headed Gulls. Three Common, ten Lesser, 750 Herring, 57 Greater and 150 Kittiwakes were counted. A single Guillemot and 70 Razorbills were off the south end of the island.

Woodpigeons generally live the island in autumn, so any we do get in October are migrants. today, 22 were seen and also seven of the Collared Dove remained.

Four Great Spotted Woodpeckers were seen including another new bird ringed at Nant.

16 Skylarks flew over the island along with eight Swallows. The first Richard's Pipit of the autumn flew south over the Observatory mid-morning. Wagtails were made up of three of each of Grey and White, two Pieds and 13 alba. A female/immature Black Redstart was at Traeth Fynnon, Ten Stonechats were counted and two Wheatears were on the Mountain. A single Redwing flew over the Obs early morning. there were 28 Goldcrests scattered around the island, mostly at Nant, where the long-staying Spotted Flycatcher was seen again.

Another good moment of corvids were noted with 85 Jackdaws, 55 Rooks, and 25 Crows along with the 37 Choughs. Starlings passed through in good numbers with 451 counted.

The passage of finches continued with 40 Chaffinches counted; these held four Brambling over the Obs in the morning. There were also 33 Siskin, 27 Goldfinch and 26 Linnets along with seven Lesser Redpolls.

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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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Monday 11 October 2021

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