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SHIANT ISLES SEABIRD COLONY REGISTER

This data is from the Joint Nature Conservation Committee & Seabird Group Seabird Colony Register.

See notes.

Species name

Count year

Count date

Accurate count

Minimum estimate

Maximum estimate

Best estimate

Unit code

Observer/source

COMMON GULL

74

 

1.00

 

 

1

2.00

D STEVENTON

COMMON GULL

79

 

1.00

 

 

1

2.00

D STEVENTON

COMMON GULL

82

006

1.00

 

 

1

2.00

D STEVENTON

COMMON GULL

85

 

 

2.00

 

2+

3.00

D STEVENTON

COMMON GULL

86

036

 

 

 

 

 

S MURRAY

COMMON GULL

95

037

5.00

 

 

5

3.50

J LOVE, UNPUB. SNH REPORT

FULMAR

70

 

 

3,449.00

3,685.00

3567

2.00

SEAFARER: M.BROOKE, D STEVENTON

FULMAR

86

036

 

6,816.00

 

6816

2.00

S MURRAY

FULMAR

95

037

5,246,00

 

 

5246

2,00

J LOVE, UNPUB. SNH REPORT

GANNET

75

 

1.00

 

 

1

1.00

D STEVENTON

GANNET

76

 

1.00

 

 

1

1.00

D STEVENTON

GANNET

79

 

1.00

 

 

1

1.00

D STEVENTON

GANNET

82

 

1.00

 

 

1

2.00

D STEVENTON

GANNET

84

095

1.00

 

 

1

2.00

I BUXTON

GANNET

85

 

1.00

 

 

1

1.00

D STEVENTON

GANNET

86

036

1.00

 

 

1

1.00

S MURRAY

GANNET

88

 

0.00

 

 

0

 

A.CAMPBELL PER S.ANGUS / TASKER & WEBB

GANNET

89

 

0.00

 

 

0

 

S.ANGUS

GANNET

90

 

0.00

 

 

0

 

OUTER HEBRIDES B.R.

GANNET

94

 

0.00

 

 

0

 

S MURRAY / S WANLESS

GANNET

95

037

1.00

 

 

1

1.00

J LOVE, UNPUB. SNH REPORT

GREAT BB GULL

70

 

 

172.00

372.00

272

2.00

SEAFARER: M.BROOKE, D STEVENTON

GREAT BB GULL

72

 

30.00

 

 

30

2.00

D STEVENTON

GREAT BB GULL

82

006

135.00

 

 

135

2.00

D STEVENTON

GREAT BB GULL

86

036

 

109.00

144.00

126

2.00

S MURRAY

GREAT BB GULL

95

037

 

164.00

 

164

3.00

J LOVE, UNPUB. SNH REPORT

GREAT SKUA

80

 

 

 

 

 

 

H.BIRBECK

GREAT SKUA

82

006

2.00

 

 

2

2.00

D STEVENTON

GREAT SKUA

85

 

 

5.00

 

5+

3.00

D STEVENTON

GREAT SKUA

86

036

2.00

3.00

5.00

6

2.00

S MURRAY

GREAT SKUA

95

037

 

14.00

15.00

14

2.00

J LOVE, UNPUB. SNH REPORT

GUILLEMOT

70

 

 

7,292.00

15,446.00

11369

1.00

SEAFARER: M.BROOKE, D STEVENTON

GUILLEMOT

82

 

 

 

 

 

 

D STEVENTON

GUILLEMOT

86

036

 

16,759.00

20,000.00

18,379

1.00

S MURRAY

GUILLEMOT

95

037

12,770.00

 

 

12770

1.00

J LOVE, UNPUB. SNH REPORT

HERRING GULL

70

...

 

182.00

217.00

199

2.00

SEAFARER: M.BROOKE, D STEVENTON

HERRING GULL

82

 

 

 

 

 

 

D STEVENTON

HERRING GULL

86

036

 

136.00

192.00

164

2.00

S MURRAY

HERRING GULL

95

037

 

44.00

 

44

2.00

J LOVE, UNPUB. SNH REPORT

KITTIWAKE

70

 

 

888.00

922.00

905

2.00

SEAFARER: M.BROOKE, D STEVENTON

KITTIWAKE

79

 

1,170.00

 

 

1170

2.00

D STEVENTON

KITTIWAKE

82

 

 

 

 

 

 

D STEVENTON

KITTIWAKE

86

036

 

1,807.00

1,920.00

1863

2.00

S MURRAY

KITTIWAKE

90

 

 

560.00

560.00

560

3.00

OUTER HEBRIDES BR

KITTIWAKE

95

037

1,808.00

 

 

1808

2.00

J LOVE, UNPUB. SNH REPORT

LESSER BB GULL

70

 

 

10.00

14.00

12

2.00

SEAFARER: M.BROOKE, D STEVENTON

LESSER BB GULL

72

 

 

72.00

 

72

2.00

D STEVENTON

LESSER BB GULL

74

 

 

25.00

 

25

2.00

D STEVENTON

LESSER BB GULL

75

 

32.00

 

 

32

2.00

D STEVENTON

LESSER BB GULL

76

 

 

22.00

 

22

2.00

D STEVENTON

LESSER BB GULL

79

 

 

14.00

 

14

2.00

D STEVENTON

LESSER BB GULL

82

 

 

 

 

 

 

D STEVENTON

LESSER BB GULL

86

036

 

42.00

60.00

51

2.00

S MURRAY

LESSER BB GULL

95

037

 

43.00

 

43

2.00

J LOVE, UNPUB. SNH REPORT

PUFFIN

70

 

 

62,792.00

89,492.00

76142

2.00

SEAFARER: M.BROOKE, D STEVENTON

PUFFIN

86

036

 

 

 

 

 

S MURRAY

RAZORBILL

70

 

 

3,149.00

3,647.00

3398

1.00

SEAFARER: M.BROOKE, D STEVENTON

RAZORBILL

86

036

 

8,195.00

13,700.00

10947

1.00

S MURRAY

RAZORBILL

95

037

7,715.00

 

 

7715

1.00

J LOVE, UNPUB. SNH REPORT

SHAG

70

-67

 

306.00

388.00

347

2.00

SEAFARER: M.BROOKE, D STEVENTON

SHAG

82

006

 

450.00

 

450

2.00

D STEVENTON

SHAG

85

 

 

700.00

 

700+

2.00

D STEVENTON

SHAG

86

036

 

1,540.00

2,013.00

1776

2.00

S MURRAY

SHAG

95

037

 

 

 

 

 

J LOVE, UNPUB. SNH REPORT

STORM PETREL

70

 

 

 

 

 

 

SEAFARER: M.BROOKE, D STEVENTON

TYSTIE

70

 

2.00

 

 

2

2.00

SEAFARER: M.BROOKE, D STEVENTON

TYSTIE

82

006

18.00

 

 

18

1.00

D STEVENTON

TYSTIE

86

036

3.00

 

 

3

1.00

S MURRAY

TYSTIE

88

084

31.00

 

 

31

1.00

A.CAMPBELL PER S.ANGUS / TASKER & WEBB

TYSTIE

95

037

2.00

 

 

2

1.00

J LOVE, UNPUB. SNH REPORT

Notes

All species are counted as pairs, except the Guillemots and Razorbills which are counted as individuals. This is because these species do not build nests, often breed at high density on inaccessible ledges, or lay their eggs out of sight. All these factors necessitate the counting of individuals rather than breeding pairs.

The only count of puffins available was done in 1970 (mostly dependent on a count of burrows). Each burrow is occupied by a pair of birds, with a single chick. Immature puffins in the colony, up to the age of 4-5, do not yet have their own burrow and are not counted separately. As a very rough rule of thumb, there will be three puffins in a colony for every occupied burrow. Puffins were also counted in 2000, but the data has not yet been submitted to the JNCC.

The most accurate count of tysties or black guillemots was done in 1988 (highlighted in bold on the spreadsheet). This species can only be counted accurately during April, prior to breeding, when adult birds gather on the sea outside their chosen nesting areas. After this they become less conspicuous as they nest in crevices in the rock. Basically, all other counts for this species do not represent an accurate census.

1995 data should be regarded as a minimum estimate as the counts were done in early July when many birds had already left the islands after breeding.

The three main surveys from which the data has been taken are Operation Seafarer (1969-1970), the Seabird Colony Register (1985-87, with some gaps covered in 1988), and Seabird 2000 (1999-2001, with gaps to be covered in 2002).