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ADU no.
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All years Observers: 1404 Cards: 103193 Records: 5453721 Incidentals: 424819 Pentads: 12918 (74.59%)
2014 Observers: 391 Cards: 4631 Records: 247130 Incidentals: 20939 Pentads: 2247 (12.97%)
AutumnMAP Observers: 276 Cards: 1796 Records: 91775 Incidentals: 6855 Pentads: 1141 (6.59%)
White-winged Tern
(Chlidonias leucopterus)
  • Google map of distribution

  • SABAP2 Distribution (Static)
      Map showing the current distribution of records for the White-winged Tern

  • SABAP2 vs SABAP1
      Map showing the distribution changes between SABAP1 and SABAP2.

  • SABAP1 distribution
      Smoothed SABAP1 distribution

  • SABAP1 Texts
      PDF of the SABAP1 pages for the species.
  • Map of the SABAP2 distribution, overlaid on the SABAP1 distribution
    Seasonal variation in reporting rates
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