Methods

The ledge was monitored using a Canon 1100D DSLR camera with an Orion StarMax102 with a 2x Barlow lens. This camera records 720p HD video on to SD cards. Maximum file size is 4GB, in practice ~18 minutes of video. The files were edited using Sony Vegas Pro 15. Shaky 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.



2018 Transcripts

  • 09/07/18 1 chick, no feeds
  • 02/07/18 12 chicks, 3 feeds
  • 01/07/18 13 chicks, 8 (+1) feeds
  • 30/06/18 13 chicks, 8 (+1) feeds
    • G180630A: (06h11m02s) - (06h26m16s), (1+) 1 feeds
    • G180630B: (06h26m17s) - (06h41m32s), 1 feed
    • G180630C: (06h41m33s) - (06h56m50s), no feeds
    • G180630D: (06h56m54s) - (07h12m10s), 2 feeds
    • G180630E: (07h12m26s) - (07h27m44s), 1 feed
    • G180630F: (07h27m46s) - (07h43m00s), no feeds
    • G180630G: (07h43m02s) - (07h58m18s), 2 feeds
    • G180630H: (07h58m20s) - (08h13m36s), 1 feed

  • 27/06/18 14 chicks, 11 feeds
    • G180627A: 06h12m50s - 06h27m50s, 1 feed
    • G180627B: 06h28m10s - 06h43m10s, 1 feed
    • G180627C: 06h43m25s - 06h58m25s, 1 feed
    • G180627D: 06h58 - , 1 feed
    • G180627E: 07h14 - , 1 feed
    • G180627F: 07h29 - , 5 feeds
    • G180627G: 07h44 - , no feeds
    • G180627H: 07h59 - , 1 feed

  • 25/06/18 14 chicks, 8 (+1) feeds
    • G180625A: 06h15 - , 2 feeds
    • G180625B: 06h30 - , 2 feeds
    • G180625C: 06h45 - , 0 (+1) feeds
    • G180625D: 07h02 - , 1 feed
    • G180625E: 07h17 - , 1 feed
    • G180625F: 07h32 - , no feeds
    • G180625G: 07h48 - , 2 feeds
    • G180625H: 08h03 - , no feeds
  • 24/06/18 14 chicks, 13 feeds
    • G180624A: 06h36 - , 2 feeds
    • G180624B: 06h51 - , 3 feeds
    • G180624C: 07h06 - , 2 feeds
    • G180624D: 07h22 - , 3 feeds
    • G180624E: 07h37 - , 1 feed
    • G180624F: 07h53 - , 2 feeds
    • G180624G: 08h08 - , no feeds
    • G180624H: 08h23 - , no feeds

  • 22/06/18 12-14 chicks, 10 feeds
    • G180622A: 07h06m00s - 07h21m00s, 1 feed
    • G180622B: 07h21m50s - 07h36m50s, 4 feeds
    • G180622C: 07h37m10s - 07h52m10s
    • G180622D: 07h52m25s - 08h07m25s
    • G180622E: 08h07m40s - 08h22m40s, 1 feed
    • G180622F: 08h23m55s - 08h38m55s
    • G180622G: 08h39m05s - 08h54m05s, 2 feeds
    • G180622H: 08h54m20s - 09h09m20s, 2 feeds

  • 10/06/18 video of F4 provisioning ledge
    • G180610A: 07h12 - 07h30
    • G180610B: 07h35m23s - 07h52m42s
    • G180610C: 07h53m02s - 08h11m08s
    • G180610D: 08h11m50s - 08h29m52s
    • G180610E: 08h30m53s - 08h48m50s
    • G180610F: 08h49m39s - 09h07m32s

Other years


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