Information

POPULATION TRENDS OF BREEDING SEABIRDS COLONIES IN SCOTTISH SPAS

The project presents trends in the data using the most complete time series data available for each designated SPA species. The project utilised data from JNCC, SNH, RSPB and other sources. The purpose of the project was to provide a collated source of


4 Species account

Each species account presents a summary of the colony count data coverage at each SPA for which that species is a designated qualifying feature. Data availability is assessed for each species since the last national census and including any data collected prior to the last national census. Where there is sufficient data a trend plot is presented for colonies at each SPA.

4.1 Northern fulmar ( Fulmarus glacialis)

4.1.1 Data availability

Table 4.1. Datat availability at northern fulmar SPAs

SPA designated for Nothern Fulmar Number of years data since S2k for all cound sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Buchan Ness to Collieston coast SPA 2 (0.18) 2 (0.18) 2 2
Calf of Eday SPA 1 (0.1) 1 (0.1) 0 0
Cape Wrath SPA 1 (0.08) 1 (0.08) 0 0
Copinsay SPA 2 (0.15) 4 (0.19) 0 3
East Caithness Cliffs SPA 1 (0.08) 1 (0.08) 0 0
Fair Isle SPA 3 (0.25) 3 (0.25) 3 3
Fetlar SPA 0 (0) 3 (0.07) 0 1
Forth Islands SPA 12 (0.86) 14 (0.95) 4 12
Flannan Islands SPA 1 (0.07) 3 (0.07) 1 1
Foula SPA 1 (0.08) 1 (0.08) 1 1
Fowlsheugh SPA 3 (0.23) 3 (0.23) 2 2
Handa SPA 3 (0.25) 3 (0.25) 2 2
Hermaness, Saxa Vord and Valla Field SPA 1 (0.08) 1 (0.08) 0 1
Hoy SPA 1 (0.08) 1 (0.15) 0 1
Mingulay and Berneray SPA 3 (0.21) 5 (0.29) 2 2
North Caithness Cliffs SPA 0 (0) 4 (0.09) 0 3
North Rona and Sula Sgeir SPA 2 (0.14) 2 (0.14) 1 1
Noss SPA 4 (0.29) 4 (0.29) 2 2
Rousay SPA 1 (0.08) 3 (0.16) 0 0
Shiant Islands SPA 1 (0.08) 1 (0.08) 0 0
St Kilda SPA 1 (0.08) 2 (0.09) 0 2
Sumburgh Head SPA 0 (0) 3 (0.14) 0 1
Troup, Pennan and Lions Heads SPA 2 (0.18) 2 (0.18) 2 2
West Westray SPA 3 (0.23) 4 (0.24) 0 3

4.1.2 Trends

Northern fulmar (Fulmarus glacialis)

4.2 Northern gannet ( Morus bassanus)

4.2.1 Data availability

Table 4.2. Data availability at northern hannet SPA's

SPA designated for Nothern Gannet Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Ailsa Craig SPA 2 (0.15) 2 (0.15) 0 3
Fair Isle SPA 12 (0.86) 12 (0.86) 13 13
Forth Islands SPA 3 (0.23) 3 (0.23) 3 3
Hermaness, Saxa Vord and Valla Field SPA 3 (0.23) 3 (0.23) 4 4
North Rona and Sula Sgeir SPA 2 (0.15) 2 (0.15) 2 2
Noss SPA 3 (0.23) 3 (0.23) 3 3
St Kilda SPA 1 (0.13) 1 (0.25) 2 2
Sule Skerry and Sule Stack SPA 1 (0.08) 5 (0.09) 0 2

4.2.2 Trends

Northern gannet (Morus bassanus)

4.3 Leach's storm petrel ( Oceanodroma leucorhoa)

4.3.1 Data availability

Table 4.3. Data availability at Leach's storm petrel SPA's

SPA designated for Leach's Storm Petrel Number of years data since S2k for all count sites. Parentesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Flannan Islands SPA 1 (0.08) 1 (0.08) 0 0
Foula SPA 1 (0.08) 1 (0.08) 0 0
North Rona and Sula Sgeir SPA 2 (0.18) 2 (0.18) 0 0
Ramna Stacks and Gruney SPA 1 (0.08) 1 (0.08) 0 0
St Kilda SPA No Data No Data No Data No Data
Sule Skerry and Sule Stack SPA No Data No Data No Data No Data

Due to insufficient data coverage no trends have been plotted for Leach's storm petrel.

4.4 European storm petrel ( Hydrobates pelagicus)

4.4.1 Data availability

Table 4.4. Data availability at European storm petrel SPA's

SPA designated for European Storm Petrel Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years daa before S2k including years with only some count sites recorded.
Auskerry SPA 3 (0.27) 3 (0.27) 0 0
Mousa SPA 1 (0.25) 1 (0.25) 1 1
North Rona and Sula Sgeir SPA 1 (0.09) 1 (0.09) 0 0
Priest Island SPA 2 (0.15) 2 (0.15) 0 0
St Kilda SPA 1 (0.08) 1 (0.08) 0 0
Sule Skerry and Sule Stack SPA 1 (0.09) 1 (0.09) 0 0

Due to insufficient data coverage no trends have been plotted for European storm petrel.

4.5 Manx shearwater ( Puffinus puffinus)

4.5.1 Data availability

Table 4.5. Data availability at Manx shearwater SPAs.

SPA designated for Manx Shearwater Number of years data since S2k for all count sites. Prenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded Number of years data before S2k including years with only some count sites recorded.
Rum SPA 1 (0.09) 1 (0.09) 0 0
St Kilda SPA 1 (0.08) 1 (0.08) 0 0

Due to insufficient data coverage no trends have been plotted for Manx shearwater.

4.6 Great cormorant ( Phalacrocorax carbo)

4.6.1 Data availability

Table 4.6. Data availability at great cormorant SPAs

SPA designated for Great Cormorant Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Calf of Eday 3 (0.25) 3 (0.25) 2 2
East Caithness Cliffs 0 (0) 12 (0.66) 0 10
Firth of Forth Islands 5 (0.36) 9 (0.70) 0 12

Four count sites have been surveyed since 2000 for cormorant. Of these four sites cormorants were recorded regualarly at Craig Leith and the Lamb. No cormorants have been observed at Bass Rock and at Inchmickery five pairs were observed in 2002 but have not been recorded there since. For the purposes of identifying a trend in population since 1986 when surveys began Bass Rock and Inchmickery have both been excluded from the analysis.

4.6.2 Trends

Great cormorant (Phalacrocorax carbo)

4.7 European shag ( Phalacrocorax aristotelis)

4.7.1 Data availability

Table 4.7. Data availability of European shag SPAs.

SPA designated for European Shag Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Buchan Ness to Collieston coast SPA 3 (0.27) 3 (0.27) 2 2
Canna and Sanday SPA 14 (1.0) 14 (1.0) 12 12
East Caithness Cliffs SPA 1 (0.08) 1 (0.08) 0 0
Fair Isle SPA 4 (0.29) 4 (0.29) 12 12
Forth Islands SPA 12 (0.86) 14 (0.95) 6 12
Foula SPA 1 (0.08) 1 (0.08) 0 0
Mingulay and Berneray SPA 3 (0.21) 5 (0.29) 2 2
Shiant Islands SPA 1 (0.08) 1 (0.08) 0 0
St Abb's Head to Fast Castle SPA 1 (0.07) 14 (0.38) 0 12
Sule Skerry and Sule Stack SPA 3 (0.21) 3 (0.21) 2 2

4.7.2 Trends

European shag (Phalacrocorax aristotelis)

4.8 Great skua ( Stercorarius skua)

4.8.1 Data availability

Table 4.8. Data availability at great skua SPAs.

SPA designated for Great Skua Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Fair Isle SPA 7 (0.64) 7 (0.64) 2 2
Fetlar SPA 0 (0) 1 (0.08) 0 2
Foula SPA 1 (0.08) 1 (0.08) 0 0
Handa SPA 8 (0.57) 8 (0.57) 7 7
Hermaness, Saxa Vord and Valla Field SPA 0 (0) 3 (0.10) 0 1
Hoy SPA 2 (0.17) 2 (0.17) 2 2
Noss SPA 2 (0.18) 2 (0.18) 0 0
St Kilda SPA 1 (0.08) 1 (0.08) 3 3

4.8.2 Trends

Great skua (Stercorarius skua)

4.9 Arctic skua ( Stercorarius parasiticus)

4.9.1 Data availability

Table 4.9. Data availability at Arctic skua SPAs.

SPA designated for Arctic Skua Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Fair Isle SPA 7 (0.64) 7 (0.64) 2 2
Fetlar SPA 1 (0.09) 3 (0.11) 0 2
Foula SPA 6 (0.50) 6 (0.50) 0 0
Hoy SPA 1 (0.08) 4 (0.21) 0 2
Papa Westray SPA 2 (0.17) 6 (0.33) 1 4
Rousay SPA 2 (0.17) 2 (0.17) 0 0
West Westray SPA 1 (0.20) 1 (0.20) 0 0

4.9.2 Trends

Arctic skua (Stercorarius parasiticus)

4.10 Lesser black-backed gull ( Larus fuscus)

4.10.1 Data availability

Table 4.10. Data availability at lesser black-backed gull SPAs.

SPA designared for Lesser Black-backed Gull Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years datat since S2k including years with only some count sites recorded. Paranthesis () indicates proportion of total possible counts. Number of years datat before S2k when all count sites were recorded Number of years datat before S2k including years with only some count sites recorded.
Ailsa Craig SPA 3 (0.27) 3 (0.27) 0 0
Fair Isle SPA 2 (0.18) 2 (0.18) 2 2
Forth Islands SPA 1 (0.07) 14 (0.57) 2 12

Due to insufficient data coverage no trends have been plotted for lesser black-backed gull.

4.11 Herring gull ( Larus argentatus)

4.11.1 Data availability

Table 4.1. Data availability at herring gull SPAs.

SPA designated for Herring Gull Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Ailsa Craig SPA 3 (0.27) 3 (0.27) 0 0
Buchan Ness to Collieston coast SPA 2 (0.18) 2 (0.18) 2 2
Canna and Sanday SPA 14 (1.0) 14 (1.0) 12 12
East Caithness Cliffs SPA 1 (0.08) 1 (0.08) 0 0
Forth Islands SPA 1 (0.07) 13 (0.63) 2 12
Fowlsheugh SPA 4 (0.31) 4 (0.31) 2 2
St Abb's Head to Fast Castle SPA 1 (0.07) 14 (0.38) 0 12
Troup, Pennan and Lions Heads SPA 2 (0.18) 2 (0.18) 2 2

Count sites at each of the islands within the Forth Islands SPA have not been recorded consistently since the Seabird 2000 national census. During collation of the raw counts five counts of the entire SPA colony at the SPA wide scale conducted separately from 2004 - 2008 were acquired from the Forth Seabird Group; these five counts have been used to identify any trends in the data over this period as they provide a more consistent data set than the SMP collected data.

4.11.2 Trends

Herring gull (Larus argentatus)

4.12 Great Black-backed Gull ( Larus marinus)

4.12.1 Data availability

Table 4.12. Data availability at great black-backed gull SPAs.

SPA designated for Great Black-backed Gull Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years datat before 52K when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Calf of Eday SPA 0 (0) 2 (0.13) 0 2
Copinsay SPA 2 (0.15) 3 (0.29) 0 0
East Caithness Cliffs SPA 1 (0.08) 1 (0.08) 0 0
Hoy SPA 0 (0) 9 (0.11) 0 4
North Rona and Sula Sgeir SPA 1 (0.07) 2 (0.14) 1 3

Due to insufficient data coverage no trends have been plotted for great black-backed gull.

4.13 Black-Legged Kittiwake ( Rissa tridactyla)

4.13.1 Data availability

Table 4.13. Data availability at black-legged kittiwake SPAs.

SPA designated for Black-legged Kittiwake Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years datat since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Ailsa Craig SPA 3 (0.27) 3 (0.27) 0 0
Buchan Ness to Collieston Coast SPA 3 (0.27) 3 (0.27) 2 2
Calf of Eday SPA 2 (0.20) 2 (0.20) 0 0
Cape Wrath 1 (0.08) 1 (0.08) 0 0
Copinsay 2 (0.15) 3 (0.17) 0 1
East Caithness 1 (0.08) 1 (0.08) 0 0
Fair Isle 4 (0.33) 4 (0.33) 4 4
Flannan Island SPA 1 (0.07) 1 (0.07) 1 1
Forth Islands 5 (0.36) 14 (0.86) 0 12
Foula SPA 11 (0.79) 11 (0.79) 4 4
Fowlsheugh SPA 3 (0.23) 3 (0.23) 3 3
Handa SPA 3 (0.21) 3 (0.21) 1 1
Hoy SPA 2 (0.15) 2 (0.15) 0 0
Marwick and Berneray SPA 4 (0.31) 4 (0.31) 4 4
Mingulay Head SPA 3 (0.21) 5 (0.29) 2 2
North Caithness Cliffs SPA 0 (0) 3 (0.08) 0 0
North Colonsay and Western Cliffs SPA 1 (0.08) 1 (0.08) 0 1
North Rona and Sula Sgeir SPA 1 (0.07) 4 (0.21) 1 2
Noss SPA 4 (0.29) 4 (0.29) 4 4
Rousay SPA 2 (0.15) 2 (0.15) 0 0
Rum SPA 1 (0.08) 1 (0.08) 0 0
St Abb's Head to Fast Castle SPA 1 (0.07) 13 (0.38) 0 12
St Kilda SPA 3 (0.23) 3 (0.23) 0 12
Sumburgh Head SPA 7 (0.50) 9 (0.57) 5 7
Shiant Islands SPA 2 (0.15) 2 (0.15) 1 1
Troup, Pennan and Lion's Head SPA 3 (0.27) 3 (0.27) 2 2
West Westray SPA 2 (0.15) 3 (0.17) 0 3

During and since the Seabird 2000 census the Inchmickery count site within the Firth of Forth Islands SPA has been surveyed five times. No kittiwakes have ever been recorded at this site and as such surveys where this site was not observed are considered to be a survey of the full Firth of Forth Islands SPA colony.

4.13.2 Trends

Black-Legged Kittiwake (Rissa tridactyla)

4.14 Little Tern ( Sterna albifrons)

4.14.1 Data availability

Table 4.14. Data availability at little tern SPAs.

SPA designated for Little Tern Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Firth of Tay & Eden Estuary SPA 2 (0.14) 8 (0.50) 1 17
Monach Islands SPA 1 (0.09) 1 (0.09) 6 6
South Uist Machair and Lochs SPA 0 (0) 1 (0.05) 0 0
Ythan Estuary, Sands of Forvie and Meikle Loch SPA 14 (1.0) 14 (1.0) 30 30

Little terns have been recorded at four count sites within the Firth of Tay and Eden Estuary SPA historically: Eden Estuary, Barry Burn, Tentsmuir and Barry Buddon. However, since the Seabird 2000 census breeding pairs were only observed at the Eden Estuary count site. At Barry Burn, Tenstmuir and Barry Buddon no terns have been recorded since 1997, 1987 and 1994 respectively. The trend line plotted for Little Tern at this site incorporates data from the Eden Estuary count site since 2000 and may not reflect the population trend across the entire SPA.

4.14.2 Trends

Little Tern (Sterna albifrons)

4.15 Common Tern ( Sterna hirundo)

4.15.1 Data availability

Table 4.15. Data availability at common tern SPA's.

SPA designated for Common Tern Number of years datat since S2k for all count sites. Parentesis () indicates proportion of total possible counts. number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Cromarty Firth SPA 11 (0.79) 13 (0.52) 0 13
Forth Islands SPA 0 (0) 14 (0.57) 0 29
Glas Eileanan SPA 13 (0.93) 13 (0.93) 14 14
Imperial Docks SPA 11 (0.79) 11 (0.79) 22 22
Inner Moray Firth SPA 13 (0.93) 13 (0.93) 14 14
Monach Islands SPA 1 (0.09) 1 (0.09) 0 0
Ythan Estuary, Sands of Forvie and Meikle Loch SPA 10 (0.71) 10 (0.71) 27 27

The Firth of Forth Island SPA common tern colony counts have been collected at five count sites historically: Bass Rock, Inchmickery, Fidra, Isle of May and Long Craig. Bass Rock has only been surveyed once in 2007 and no pairs were observed so this was excluded from further analysis. No birds have been observed at Inchmickery and Fidra since 1998 and 1994 respectively. For the purposes of identifying a population trend raw counts at Isle of May and Long Craig have been plotted since 2000.

4.15.2 Trends

Common Tern (Sterna hirundo)

4.16 Arctic Tern ( Sterna paradisaea)

4.16.1 Data availability

Table 4.16. Data availability at Arctic tern SPAs.

SPA designated for Arctic Tern Number of years data since S2k for all count sites. Parenthesis () indicates proortion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Auskerry SPA 8 (0.57) 8 (0.57) 17 17
Fair Isle SPA 13 (0.93) 13 (0.93) 29 29
Fetlar SPA 13 (0.93) 13 (0.93) 9 9
Forth Islands SPA 0 (0) 14 (0.41) 0 29
Foula SPA 8 (0.57) 8 (0.57) 28 28
Mousa SPA 12 (0.86) 12 (0.86) 10 10
Papa Stour SPA 1 (0.08) 1 (0.08) 0 0
Papa Westray SPA 4 (0.29) 13 (0.61) 0 24
Pentland Firth Islands SPA 3 (0.38) 4 (0.44) 0 17
Rousay SPA 0 (0) 0 (0) 1 1
Sumburgh Head SPA No Data No Data No Data No Data
West Westray SPA No Data No Data No Data No Data

Historically Arctic tern colony counts have been undertaken at four count sites: Bass Rock, Fidra, Inchmickery and Isle of May. However, no pairs have been recorded at any count sites since the Seabird 2000 census although not all count sites have been surveyed every year. Consequently the trend line plotted for Arctic terns uses data from the Isle of May count site only collected from 2000.

4.16.2 Trends

Arctic Tern (Sterna paradisaea)

4.17 Roseate Tern ( Sterna dougallii)

4.17.1 Data availability

Table 4.17. Data availability at Roseate tern SPAs.

SPA designated for Roseate Tern Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () iindicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Forth Islands SPA No Data No Data No Data No Data

Due to insufficient data coverage no trends have been plotted for Roseate tern.

4.18 Sandwich tern ( Sterna sandvicensis)

4.18.1 Data availability

Table 4.18 Data availability at Sandwich tern SPAs.

SPA designated for Sandwich Tern Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Forth Islands SPA 9 (0.64) 12 (0.75) 29 29
Loch of Strathbeg SPA 12 (0.86) 12 (0.86) 29 29
Ythan Estuary, Sands of Forvie and Miekle Loch SPA 13 (0.93) 13 (0.93) 30 30

The Firth of Forth Island Sandwich tern population has been recorded at four count sites historically: Fidra, Inchmickery, Isle of May and Long Craig. In recent years few pairs have been observed at any of these sites and in 2007, 2008 and 2010 not all count sites were observed. Furthermore, since 2006 only one nesting pair has been observed at any count sites. To identify any trends in population only data collected between 1969 and 2005 has been plotted.

4.18.2 Trends

Sandwich tern (Sterna sandvicensis)

4.19 Guillemot ( Uria aalge)

4.19.1 Data availability

Table 4.19. Data availability at Guillemot SPAs.

SPA designated for Guillemot Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Ailsa Craig SPA 3 (0.27) 3 (0.27) 0 0
Buchan Ness to Collieston Coast SPA 2 (0.18) 2 (0.18) 2 2
Calf of Eday SPA 2 (0.2) 2 (0.2) 0 0
Canna and Sanday SPA 1 (0.08) 1 (0.08) 0 0
Cape Wrath SPA 1 (0.08) 1 (0.08) 0 0
Copinsay SPA 3 (0.23) 3 (0.23) 1 1
East Caithness Cliffs SPA 1 (0.08) 1 (0.08) 0 0
Fair Isle SPA 3 (0.23) 3 (0.23) 1 1
Forth Islands SPA 12 (0.86) 14 (0.96) 2 11
Flannan Islands SPA 1 (0.07) 1 (0.07) 1 1
Foula SPA 1 (0.08) 1 (0.08) 0 0
Fowlsheugh SPA 3 (0.23) 3 (0.23) 2 2
Handa SPA 4 (0.29) 4 (0.29) 2 2
Hermaness, Saxa Vord and Valla Field SPA 0 (0) 4 (0.10) 0 5
Hoy SPA 2 (0.15) 2 (0.15) 0 0
Marwick Head SPA 3 (0.23) 3 (0.23) 2 2
Mingulay and Berneray SPA 3 (0.21) 5 (0.29) 1 2
North Caithness Cliffs SPA 0 (0) 3 (0.08) 0 2
North Colonsay and Western Cliffs SPA 1 (0.07) 4 (0.09) 0 2
North Rona and Sula Sgeir SPA 1 (0.07) 1 (0.11) 1 2
Noss SPA 4 (0.36) 4 (0.36) 3 3
Rousay SPA 1 (0.08) 3 (0.15) 0 0
Rum SPA 1 (0.08) 1 (0.08) 0 0
Shiant Isles SPA 2 (0.15) 2 (0.15) 0 0
St Abb's Head to Fast Castle SPA 0 (0) 4 (0.12) 0 6
St Kilda SPA 1 (0.08) 1 (0.08) 0 1
Sule Skerry and Sule Stack SPA 1 (0.07) 2 (0.11) 1 2
Sumburgh Head SPA 0 (0) 4 (0.18) 0 6
Troup, Pennan and Lions Heads SPA 2 (0.18) 2 (0.18) 2 2
West Westray SPA 2 (0.15) 3 (0.17) 0 3

4.19.2 Trends

Guillemot (Uria aalge)

4.20 Razorbill ( Alca torda)

4.20.1 Data availability

Table 4.20. Data availability at Razorbill SPAs.

SPA designated for Razorbill Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportion of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Cape Wrath SPA 1 (0.08) 1 (0.08) 0 0
East Caithness Cliffs 1 (0.08) 1 (0.08) 0 0
Fair Isle SPA 4 (0.29) 4 (0.29) 3 3
Forth Islands SPA 13 (0.93) 14 (0.96) 4 13
Flannan Islands SPA 1 (0.07) 1 (0.07) 1 1
Foula SPA 1 (0.08) 1 (0.08) 1 1
Fowlsheugh SPA 3 (0.23) 3 (0.23) 2 2
Handa SPA 3 (0.27) 3 (0.27) 2 2
Mingulay and Berneray SPA 3 (0.21) 5 (0.29) 1 2
North Caithness Cliffs SPA 0 (0) 3 (0.08) 0 0
North Rona and Sula Sgeir SPA 1 (0.07) 2 (0.11) 1 2
Shiant Islands SPA 2 (0.15) 2 (0.15) 0 0
St Abb's Head to Fast Castle SPA 0 (0) 4 (0.12) 0 6
St Kilda SPA 1 (0.08) 1 (0.08) 0 3
Troup, Pennan and Lions Heads SPA 2 (0.18) 2 (0.18) 2 2
West Westray SPA 2 (0.15) 3 (0.17) 0 0

4.20.2 Trends

Razorbill (Alca torda)

4.21 Atlantic puffin ( Fratercula arctica)

4.21.1 Data availability

Table 4.12. Data availability at Atlantic Puffin SPAs.

SPA designated for Atlantic Puffin Number of years data since S2k for all count sites. Parenthesis () indicates proportion of total possible counts. Number of years data since S2k including years with only some count sites recorded. Parenthesis () indicates proportions of total possible counts. Number of years data before S2k when all count sites were recorded. Number of years data before S2k including years with only some count sites recorded.
Canna and Sanday SPA 1 (0.08) 1 (0.08) 0 0
Cape Wrath SPA No Data No Data No Data No Data
East Caithness Cliffs SPA 1 (0.08) 1 (0.08) 1 1
Fair Isle SPA 4 (0.33) 4 (0.33) 3 3
Forth Islands SPA 0 (0) 6 (0.17) 0 5
Flannan Islands SPA 0 (0) 2 (0.04) 0 1
Foula SPA 1 (0.08) 1 (0.08) 0 0
Hermaness, Saxa Vord and Valla Field SPA 2 (0.15) 2 (0.15) 3 3
Hoy SPA No Data No Data No Data No Data
Mingulay and Berneray SPA 2 (0.14) 5 (0.25) 0 0
North Caithness Cliffs SPA 0 (0) 2 (0.08) 0 0
North Rona and Sula Sgeir SPA 0 (0) 1 (0.07) 0 1
Noss SPA 3 (0.23) 3 (0.23) 1 1
Shiant Islands SPA 1 (0.08) 1 (0.08) 0 0
St Kilda SPA 0 (0) 2 (0.08) 0 2
Sule Skerry and Sule Stack SPA 1 (0.07) 1 (0.07) 2 2

Due to insufficient data coverage no trends have been plotted for Atlantic puffin.

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