Bardsey's Wildlife

Sunday 29 March 2020

An eye-wateringly cold and strong breeze from the North characterised most of today and it didn't really give up at all. Wind speeds peaked at around 35mph which totally foiled any plans to try and ring, for the second day in a row.

Birding conditions were made very difficult by the wind for two reasons: 1) it becomes increasingly hard to hold your binoculars steady as you gradually lose more feeling in your hands to the cold and 2) most birds are well-hunkered down in the cover and are not singing as they have been in recent days, understandably...

With a wind from the North, George headed to the North Hide in the hope that some seabirds may be passing reasonably close-in. On the way, the first lamb had been born in the North West Fields, there'll be lots more to come in the coming weeks!

lamb in the North West Fields

The session in the North Hide was reasonably productive - Manxies, Gannets and Auks gave good views and two more species made their way onto the year list: Mediterranean Gull and Grey Plover. Both of these species were good records as Mediterranean Gulls are scarce on the island in spring and only a handful of Grey Plovers are recorded annually.

looking North-West from the North Hide

A walk down the West Coast produced small numbers of waders with Whimbrel being the highlight. Four Canada Geese on the narrows was a 'good' record - these are still scarce here on the island with only 55 records before this year, but with 18 records in the last three years.

heading South down the West Coast towards Solfach

The afternoon was spent entering the recent days' ringing records into the BTO's Demography Online or 'DemOn' for short. It has been good for ringing since coming back onto the island, hopefully we will get a chance to open the nets again before March is over.

The gorse is beginning to come into flower nicely, soon the mountainside

will be ablaze with yellow

The ringed Black Redstart was seen in the Observatory garden in the afternoon and the Stock Dove was also still present in the Lowlands.

Late evening saw another Bardsey sunset give way to yet another beautifully clear night tonight which allowed brilliant views of both Venus and the crescent Moon.

sunset from the Observatory

another starry night on the island, though the growing moon is now starting to reduce

the manxie numbers coming ashore.

Other sightings today included: 52 Manx Shearwaters, four Kittiwakes, one Common Gull, four Gannets, four Curlews, 15 Goldcrests, 13 Chiffchaffs, one Blackcap, one Black Redstart, 16 Turnstones and 96 Oystercatchers.

No ringing today, unfortunately, due to high winds.

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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 29 March 2020

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