Norrard Rocks

Norrard Rocks
Geography
Gweal viewed from Bryher
Norrard Rocks
Coordinates	49°57′12″N 6°22′12″W / 49.9533°N 6.3700°W / 49.9533; -6.3700Coordinates: 49°57′12″N 6°22′12″W / 49.9533°N 6.3700°W / 49.9533; -6.3700
OS grid reference	SV867152
Archipelago	Isles of Scilly
Administration
United Kingdom
Civil parish	Bryher
Demographics
Population	0

The Norrard (Northern) Rocks are a group of small uninhabited granite rocks in the north–western part of the Isles of Scilly, to the west of Bryher and Samson. In 1971 they were designated as a Site of Special Scientific Interest (SSSI) for their breeding seabird colonies and they are permanently closed to landings from boat passengers. The vegetation on the islands is limited by the extreme exposure and only six species of flowering plants have been recorded.^[1]

Nature reserve

The islands are largely managed as nature reserves by the Isles of Scilly Wildlife Trust, principally for breeding seabirds and grey seals (Halichoerus grypus). The only breeding sites for European Storm–petrel in England are on the Isles of Scilly with eleven colonies and an estimated 1475 occupied sites (i.e. breeding pairs). There are only three small breeding colonies on the Norrard Rocks; Mincarlo, Illiswilgig and Castle Bryher with a total of 37 pairs.^[2] Other seabirds breeding within the SSSI are Fulmar (Fulmarus glacialis), Guillemot (Uria aalge), Lesser Black–backed Gull (Larus fuscus) and Herring Gull (L argentatus). The rove beetle (Omalium allardi) has been recorded on several of the islands.^[1]

Individual islands and rocks

The islands and rocks are listed below in decreasing order of area.^[3]

Gweal

(Cornish: Gwithial, place of trees) (grid reference SV866152) 5.82 hectares (14.4 acres) and 32 metres (105 ft) high.

Gweal is a small rocky island consisting of two hills linked by a boulder beach, just off the west coast of Bryher and is an occasional pupping site for grey seal. Plants recorded are sea beet (Beta vulgaris subsp. maritima ), rock sea–spurry (Spergularia rupicola), common scurvygrass (Cochlearia officinalis), thrift (Armeria maritima) and tree mallow (Lavatera arborea).

Scilly Rock

(grid reference SV859156) 1.98 hectares (4.9 acres)

Scilly Rock is just over 1 kilometre (0.62 mi) west of Bryher is a large rock, divided by a deep chasm into two parts with a maximum height of 22 metres (72 ft). Each part has a summit named North Cuckoo and South Cuckoo. Landing is difficult and only possible in calm conditions. It is reputedly the island from which the rest of the archipelago gets its name although there is no evidence or explanation for this. Puffin (Fratercula arctica) breed and the only plants recorded are rock sea-spurrey and oraches (Atriplex) species.^[3]^[4]

Mincarlo

(Cornish: Men Karleyth, rayfish stone) (grid reference SV853129) 1.82 hectares (4.5 acres)

Mincarlo is the southernmost of the group 2 kilometres (1.2 mi) west of Samson. Several species nest on the island including the largest breeding colony of Cormorant (Phalacrocorax carbo) in the Isles of Scilly as well as Puffin, Great Black–backed Gull (Larus marinus), Razorbill (Alca torda) and Common Shag (Phalacrocorax aristotelis). The breeding colony of European Storm–petrel (Hydrobates pelagicus) occupied 17 sites during the Seabird 2000 survey. Tree mallow, orache, common scurveygrass, rock sea–spurrey and sea beet have all been recorded. The rocks are a main pupping site for grey seal (Halichoerus grypus). The Arachnologist, W S Bristow visited the Isles of Scilly in 1928, 1929 and 1934 and landed on many of the uninhabited islands. On Mincarlo he recorded the following spiders; Trochosa terricola, Oedothorax fuscus, Lepthyphantes tenuis, Dismodicus bifrons, Xysticus kochi and Halorates reprobus which is associated with the nests of seabirds, especially cormorant and shag.^[5]

Illiswilgig

(Cornish: Enys Welsek, grassy island) (grid reference SV858139) 0.90 hectares (2.2 acres)

Several species have bred on Illiswilgig, including a small colony of only three pairs of European Storm–petrel, recorded during the Seascape 2000 survey. Plants recorded are tree mallow, thrift, sea beet, rock sea–spurrey, common scurvy grass, orache and English stonecrop (Sedum anglicum). Illiswilgig is a main pupping and haul–out site for grey seal.

Maiden Bower

(Cornish: Meyn-Meur, great stones) (grid reference SV850145) 0.66 hectares (1.6 acres)

Only a few gulls breed on Maiden Bower and no plants have been recorded.

Castle Bryher

(Cornish: Kastel Breyer, Bryher's castle)(grid reference SV863140) 0.39 hectares (0.96 acres) and 26 metres (85 ft)

The Seabird 2000 survey recorded 17 occupied sites of European Storm–petrel. Puffin and gulls also breed on the island and plants recorded are tree mallow, sea beet, rock sea-spurrey, common scurvygrass and orache.

Seal Rock

(grid reference SV854141) 0.20 hectares (0.49 acres)

An important breeding and haul out site for grey seal and orache is the only plant recorded.

References

1 2 "Norrard Rocks" (PDF). Natural England. 17 December 1986. Retrieved 20 December 2011.
↑ P Ian Mitchell, Stephen F Newton, Norman Ratcliffe and Timothy E Dunn. "Seabird Populations of Britain and Ireland: results of the Seabird 2000 census (1998-2002).". London: T and A.D. Poyser. Retrieved 15 November 2012.
1 2 Parslow, Rosemary (2007). The Isles of Scilly. London: HarperCollins. ISBN 978-0-00-220150-6.
↑ North, J. W. (1850). A Week in the Isles of Scilly. London: Longman & Co.
↑ Bristowe, W S (1935). "Further notes on the spiders of the Scilly Islands". Proc.zool.Soc.Lond.: 219–32.

External links

Media related to Norrard Rocks at Wikimedia Commons

Isles of Scilly

Inhabited islands	St Mary's St Agnes (and Gugh) Bryher Tresco St Martin's

Uninhabited islands	Annet Bishop Rock Crim Rocks Eastern Isles English Island Great Ganilly Gweal Norrard Rocks Pednathise Head Rosevear Round Island Samson St Helen's Teän Western Rocks White Island Zantman's Rock

Settlements	St Mary's: Hugh Town, Holy Vale, Longstone, Maypole, Normandy, Old Town, Pelistry, Porthloo, Rocky Hill, Telegraph and Trenoweth St Martin's (and St Agnes): Higher Town, Middle Town and Lower Town Tresco: New Grimsby and Old Grimsby

Topics	Environment History People Schools Transport

Biological Sites of Special Scientific Interest in Cornwall and the Isles of Scilly

Summary	Summarised data for all sites (biological and geological)

Cornwall	Aire Point to Carrick Du Amble Marshes Baulk Head to Mullion Bedruthan Steps and Park Head Boconnoc Park and Woods Bodmin Moor, North Borlasevath and Retallack Moor Boscastle to Widemouth Brendonmoor Breney Common Bude Coast Cabilla Manor Wood Caerthillian to Kennack Carnkief Pond Carrick Heaths Carricknath Point to Porthbean Beach Carrine Common & Penwethers Chyenhal Moor Cligga Head Coombe Mill Coverack to Porthoustock Crow's Nest Crowhill Valley Dozmary Pool Draynes Wood East Lizard Heathlands Eglarooze Cliff Gerrans Bay to Camels Cove Godrevy Head to St Agnes Goonhilly Downs Goss and Tregoss Moors Greenamoor Greenscoombe Wood, Luckett Grimscott Gwithian to Mexico Towans Hayle Estuary & Carrack Gladden Kelsey Head Kennack to Coverack Kernick and Ottery Meadows Loe Pool Loggans Moor Lower Bostraze and Leswidden Lower Fal & Helford Intertidal Lymsworthy Meadows Lynher Estuary Malpas Estuary Marazion Marsh Meddon Moor Meneage Coastal Section Merthen Wood Minster Church Mullion Cliff to Predannack Cliff Nance Wood Newlyn Downs Ottery Valley Park Wood Penhale Dunes Pentire Peninsula Phoenix United Mine Plymouth Sound Shores And Cliffs Polruan to Polperro Polyne Quarry Porthgwarra to Pordenack Point Rame Head & Whitsand Bay Red Moor Redlake Meadows & Hoggs Moor Retire Common River Camel Valley and Tributaries Rock Dunes Rosemullion Rosenannon Bog and Downs St Austell Clay Pits St John's Lake St Nectan's Glen Steeple Point to Marsland Mouth Swanpool Sylvia's Meadow Talland Barton Tamar–Tavy Estuary Tintagel Cliffs Treen Cliff Tregonetha & Belowda Downs Tregonning Hill Trehane Barton Trelow Downs Trevose Head and Constantine Bay Upper Fal Estuary and Woods Upper Fowey Valley Ventongimps Moor West Cornwall Bryophytes West Lizard

Isles of Scilly	Annet Big Pool and Browarth Point Castle Down (Tresco) Chapel Down Eastern Isles Great Pool Gugh Higher Moors and Porth Hellick Pool Lower Moors Norrard Rocks Peninnis Head Pentle Bay, Merrick And Round Islands Plains and Great Bay Pool Of Bryher & Popplestone Bank Rushy Bay and Heathy Hill Samson Shipman Head & Shipman Down St Helen's St Martin's Sedimentary Shore Teän Western Rocks White Island Wingletang Down

Neighbouring areas Sites of Special Scientific Interest in Devon Sites of Special Scientific Interest in Somerset

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