Bardsey's Wildlife

Saturday, 7 August 2021

As on mosts Saturday's we say goodbye to the guests from one week and hello to the incoming guests. The weather overnight was awful, and both Steve and Colin had wondered whether it would calm enough to do the crossing. Everyone was on standby to leave and at 08:30 hrs we were given the green light and the crossing was on! We said goodbye to Paul Massey (AW here in 1997) and his lovely family and set to preparing the Obs for Jeff and Richard. So at 09:00 saw the obs team cleaning and scrubbing, and dismantling the makeshift kitchen in the boot room, as staff and guests were now legally allowed to mix indoors, and we were getting ready to run again as a hostel for the first time since late October 2019!

The Lodge back as a hostel!

It was also another manic morning on the solar front for Chris and Phil, the final supplies arrived on the boat for them to get the last bank of panels wired together before they left, and by noon, we had 114 volts of power coming down the hill into the solar room. The lads (and Steve & Connor) had worked hard all week getting the panels installed, wires laid underground, the controls boxes fitted and all wired up. We are now just waiting for Chris and Phil along with Mark Crane to come over on Tuesday and programme the inverters and then the grand switch-on...

Solar room ready for the switch on

By mid-afternoon the guests were in, a team meeting had been done and it was time for a wander around the island to see what was happening bird-wise. Fist thing in the morning, three swallows had fledged from the Obs tool shed.

The young House Martins in the nest box in the porch of Cristin are getting bigger and should fledge any day now! it's been a long time since Steve Hinde fitted the boxes, and we think there are three little beauties inside the box. What has been odd is there has been three adults feeding them on occasion!

sooo cute! House Martin

Stuart and Louis headed south, whilst Steve and Emma went north. It was, as to be expected at that time of day, rather quiet. A few linnets have begin feeding in the garden at the obs on the seed heads from some of the brassica-type weeds.

Adult male Linnet

Adult male and juvenile Linnet

Steve found a juvenile Yellow-legged Gull with the gulls at the north end of the island near the hide and this overfly in the garden it Ty Bach.

Eristalis sp., maybe E. arbustorum

Jeff and Richard were in the hide counting Manx Shearwaters. Steve and Emma joined them for the last hours and a half and by the 20:00 they had seen over 10,000 pass in a couple of hours, an amazing sight! Along with 2000 in the morning the day's count was well over 12k!

Dusk at the north hide

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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, 7 August 2021

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