Bardsey's Wildlife

Tuesday 16 August 2016

Generally a quieter day in terms of numbers of birds but the day still had its highlights. A Red Kite soaring over the mountain and low over the Observatory was a great addition to the year of a fairly scarce bird for Bardsey. Prior to this sighting there had only been 21 previous records, far fewer records than Marsh Harrier of which 41 have been logged. A couple of Sparrowhawks lingered as did a Common Buzzard, four Kestrels and one Peregrin Falcon.

Red Kite

A clear out of Willow Warblers left numbers as low as five, three appearing in the Observatory garden, one in the Plantation which previously held good numbers and another in one of the gardens. Spotted Flycatchers featured as a small increase in numbers totalled four and the first Song Thrush of the year was seen. A Blackcap, two Chiffchaffs, two Goldcrests and two Chaffinches were close by. Wheatears flitted from the banks and stone walls further south with 19 noted as 49 Meadow Pipits, nine Rock Pipits, one Grey Wagtail over the North West Fields, 12 Pied Wagtails, six Stonechats, 211 Linnets and a Little Owl and Collard Dove bolstered the numbers.

A variety of waders featured again today along the coastlines. The usual Oystercatchers numbered 52 today scatted about. Around the Narrows five Ringed Plovers, 20 Dunlins, a Green Sandpiper, Common Sandpiper and 30 Turnstones were present. Whilst two Whimbrels, 36 Curlews and a Greenshank were also recorded.

Small numbers of Cormorants, 12, were again noted today. Some moved passed the island whilst others were seen out on the sea or on rocks around the island. Grey Heron numbers had increased again from five yesterday to seven today, spending most of their time around the Narrows. Further out 14 Fulmars, 500 Manx Shearwaters, 29 Gannets and two Common Scoters passed. Harbour Porpoise, of which 15 were seen and eight Risso's Dolphins lingered off the west coast.

A Migrant Hawker, possibly one of the two seen yesterday was present in the same garden today resting on the Fuchsia in the warm morning sun. Again a good spread of Lepidoptera was present on the island with ten species seen. Large Whites logged were six whilst 61 Green-veined Whites, four Small Coppers, three Common Blues, four Red Admirals, one Painted Lady, three Small Tortoiseshells, 15 Peacocks, one Greyling and 20 Meadow Browns were also seen.

This Garden Pebble (Evergestis forficalis) was the highlight from the moth traps, being the first record of this immigrant micro moth on the island since 1999

Marbled Beauty was also trapped

Migrant Hawker in one of the gardens at Nant

No comments:

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

Pages

Tuesday 16 August 2016

No comments:

Post a Comment

Pages