• Provisioning rate Provisioning rate of 0.33 feeds per chick hour
    (72 feeds / 218 chick.hours = 1.32 feeds per chick per 4 hours).
  • Parental attendance Mean time that both parents were at nest site was 12.29% (=27h02m00s/220h00m00s).
  • Feeding-trip duration 20 timed feeds out of 79 (25%). Mean duration of timed feeds = 44m50s, median duration = 33m54s.
  • Chick diet in 2015
  • Productivity in 2015 In 2015 there were 19 focal sites on my St Philip's Stone survey ledge. There were 17 active sites and 2 regular sites. 13 sites produced chicks that either fledged, or were of fledging age (+15days old) when last seen. This gives a productivity of 68%. Of these 13 chicks, at least one failed post fledging.

 2015  15   18   21   23   24   25   27   29   02  | total
06h30 2/12 .... .... 0/12 .... .... 4/12 0/13 .... |  6/49
06h45 1/12 1/12 .... 3/12 .... 2/12 0/12 1/13 .... |  8/73
07h00 1/12 0/12 2/12 0/12 .... 2/12 3/12 1/13 1/13 | 10/98
07h15 .... 0/12 2/12 .... 2/12 1/12 0/12 .... 0/13 |  5/73
07h30 0/12 3/12 1/12 2/12 2/12 .... .... 0/13 1/13 |  9/86
07h45 2/12 .... .... 0/12 2/12 0/12 0/12 1/13 .... |  5/73
08h00 1/12 2/12 1/12 2/12 .... 2/12 0/12 1/13 2/13 | 11/98
08h15 0/12 1/12 0/12 .... 1/12 1/12 1/12 .... 0/13 |  4/85
08h30 .... 0/12 1/12 .... 0/12 .... .... .... 2/13 |  3/49
08h45 .... .... .... .... 0/12 .... .... .... .... |  0/12


Methods

The ledge was monitored using a Canon XL2 video camera with a Canon 100-400mm L lens. This camera records Standard Definiton 25p PAL video on to 60 minute miniDV tapes, in practice these tapes produce just over 62 minutes of usable video. The tapes were captured onto computer using Sony Video Capture 6.0e and edited using Sony Vegas Pro 8.0b. Corrupt video at the beginning or end of a recording was deleted. For those measurements where a standard length of time is needed (provisioning rate, parental attendance, etc.) only the first 60 minutes of video was used.

Focal sites were identified by the presence of an incubating or brooding adult, or by the presence of a pair of birds. Pairs were identified by mutual interactions; particularly mutual preening, or displays. For transcription purposes, adults were noted with their focal site letter and a number. For each day, the initially brooding bird was number 1, and the non-brooding bird was number 2.



2015 Transcripts

  • 15/07/15 1 chick
  • G150715A: 0hm - , feeds
  • 09/07/15 +3 chicks. Mono audio. (sea noise)
  • G150709A: 07h34m09s - 08h36m26s, close-ups, Razorbill chick
  • 06/07/15 5 chicks. No audio
  • G150706A: 07h27m50s - 07h39m14s, feeds
  • 02/07/15 13 chicks. Mono audio.
  • G150702A: 06h51m52s - 07h54m25s, 2 feeds
  • G150702B: 07h54m56s - 08h57m22s, 5 feeds
  • 30/06/15 close-ups of chicks, metal-ringed adult Im
  • G150630A: did not record
  • G150630B: 07h30m38s - 08h31m01s. Mono Audio
  • 29/06/15 13 chicks. Mono Audio
  • G150629A: 06h16m24s - 07h18m52s, 2 feeds
  • G150629B: 07h19m23s - 08h21m49s, 5 feeds
  • 27/06/15 12 chicks. No audio
  • G150627A: 06h28m10s - 07h30m46s, 7 feeds
  • G150627B: 07h31m23s - 08h33m53s, (1+)2+1 feeds
  • 25/06/15 12 chicks. No audio
  • G150625A: 06h30m02s - 07h32m36s, 7 feeds
  • G150625B: 07h33m08s - 08h35m40s, 3+1 feeds
  • 24/06/15 12 chicks. Mono audio
  • G150624A: 07h00m36s - 08h03m10s, (1+)6+1 feeds
  • G150624B: 08h04m29s - 09h07m02s, (1+)2 feeds
  • G150624C: 09h16m39s - , Close-ups of chicks
  • 23/06/15 12 chicks
  • G150623A: 06h20m21s - 07h22m54s: 3 feeds
  • G150623B: 07h23m46s - 08h26m20s: 4+1 feeds
  • 21/06/15 12 chicks
  • G150621A: 06h50m36s - 07h53m07s: 5 feeds
  • G150621B: 07h53m50s - 08h56m22s: 4 feeds
  • 18/06/15 12 chicks
  • G150618A: 06h43m44s - 07h46m19s: 4 feeds
  • G150618B: 07h47m08s - 08h49m43s: 3 feeds
  • 15/06/15 +10 chicks
  • G150615A: 06h25m58s - 07h28m27s: 5 feeds
  • G150615B: 07h29m02s - 08h31m35s: 3 feeds
  • 14/06/15 +4 chicks. Mono audio
  • G150614A: 07h18m25s - 08h20m53s: close-ups of brooding adults
  • 12/06/15 +3 chicks. Mono audio
  • G150612A: 06h40m00s - 07h42m09s: 2 feeds
  • G150612B: 07h43m21s - 08h45m54s: 1 feed
  • 07/06/15 Close-up video of site I, St Philip's Stone Provisioning ledge. Mono? audio
  • G150607A: 06h33m - Canon XL2, Orion StarMax 102, 1/50s, auto gain, 25p SD, PAL 4:3
  • 04/06/15 Close-up video of site I, St Philip's Stone Provisioning ledge. Mono? audio
  • G150604A: 06h33m - Canon XL2, Orion StarMax 102, 1/50s, auto gain, 25p SD, PAL 4:3
  • G150604B: 07h35m - Canon XL2, Orion StarMax 102, 1/50s, auto gain, 25p SD, PAL 4:3
  • 03/06/15 Video of St Philip's Stone Provisioning ledge. Stereo audio
  • G150603A: 07h44m - Canon XL2, Canon 100-400L IS, Tv50, AE -0.5, -3dB gain, 25p SD, PAL 16:9
  • 27/05/15 Video of St Philip's Stone Provisioning ledge. Stereo audio
  • G150527A: 06h44m - Canon XL2, Canon 100-400L IS, Tv50, AE -0.5, -3dB gain, 25p SD, PAL 16:9
  • G150527B: 07hm - Canon XL2, Canon 100-400L IS, Tv50, AE -0.5, -3dB gain, 25p SD, PAL 16:9
  • 20/05/15 Video of St Philip's Stone Provisioning ledge
  • G150520A: 07h30m05s - 08h32m30s Canon XL2, Canon 100-400L IS, Tv50, AE -0.5, -3dB gain, 25p SD, PAL 16:9
  • 15/05/15 Close-up video of site I, St Philip's Stone Provisioning ledge. No audio
  • G150515A: - Canon XL2, Orion StarMax102, 0.5x focal reducer, 1/100s, -3dB gain, 25p SD
  • 13/05/15 Close-up video of site I, St Philip's Stone Provisioning ledge
  • G150513A1: - Canon XL2, Orion StarMax102, 0.5x focal reducer, 1/100s, -3dB gain, 25p SD
  • G150513A2: - Canon XL2, Orion StarMax102, 1/50s, 6dB gain, 25p SD
  • G150513A3: - Canon XL2, Orion StarMax102, 1/50s, 3dB gain, 25p SD
  • 22/04/15 1192 Guillemots on ledges. Video of St Philip's Stone Provisioning ledge
  • G150422A: 07h17m08s - 08h19m33s, Canon XL2, Orion StarMax102, 0.5x focal reducer, 1/75s, -3dB gain, 25p SD
  • 20/04/15 1647 Guillemots on ledges. Video of St Philip's Stone Provisioning ledge
  • G150420A: 07h22m59s - 08h??m??s, Canon XL2, Orion StarMax102, 0.5x focal reducer, 1/75s, -3dB gain, 25p SD
  • 25/03/15 179+ Guillemots on ledges. Video of St Philip's Stone breeding survey ledge.
  • G150325: 07h28m47s - 08h30m57s, Canon XL2, Orion StarMax102, 0.5x Focal Reducer, 1/50s -3dB gain 25p SD
  • 10/03/15 706+ Guillemots on ledges (only St Philip's - St Mark's count). Video of St Philip's Stone breeding survey ledge. Stereo audio
  • G150310A: 07h37m38s - 08h03m33s, Canon XL2, Orion StarMax102, Orion Imaging Flip Mirror. 1/25s +12dB gain 25p SD
  • G150310B: 08h15m17s - 08h37m16s, Canon XL2, Orion StarMax102, 0.5x? Focal Reducer. 1/100s -3dB gain 25p SD
  • 30/12/14 1145 Guillemots on ledges, 40 minutes video F4 provisioning ledge.

Individual Common Guillemots on Lundy

This year's chicks are being named after Landmark Trust properties to celebrate the 50th anniversary of the Landmark Trust

  • GU:STPH2015Zx rarely 2 birds at this site.
  • GU:STPH2015Ac "Ascog" First feed 29/6
  • GU:STPH2015Bc "Belmont" First fed 18/6
  • GU:STPH2015Cc "Cawood" First fed 18/6
  • GU:STPH2015Dc "Dutton" First seen 14/6
  • GU:STPH2015Ec "Elton" First seen 12/6
  • GU:STPH2015Jx Mating 12/6
  • GU:STPH2015Fe Egg seen 13/5, 15/5, 12/6
  • GU:STPH2015Gc "Gothic" First seen 15/6
  • GU:STPH2015Im metal ringed adult
  • GU:STPH2015Ic "Ingestre" First seen 14/6
  • GU:STPH2015Mx egg? 3/6, lost before 7/6
  • GU:STPH2015Nc "Nicolle" First seen 12/6
  • GU:STPH2015Oc "Obriss" First seen 12/6
  • GU:STPH2015Pc "Princelet" First seen 15/06
  • GU:STPH2015Qc "Queen Anne" Feed? 15/6
  • GU:STPH2015T egg seen 15/5, lost before 4/6
  • GU:STPH2015Rc "Roslin" Feed? 15/6
  • GU:STPH2015Sc "Shute" Feed? 15<>/6
  • GU:STPH2015Ux regular site, no egg

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