BIRD POPULATIONS - Birdpop.org

JANNIK HANSEN, LARS HOLST HANSEN, NIELS MARTIN SCHMIDT AND JEROEN RENEERKENSTABLE 3. Dates of first observation of selected species at Zackenberg 1996-2007.Species 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007Red-throated Diver ≤3.6 30.5 3.6 4.6 6.6 3.6 1.6 ≤4.6 ≤1.6 29.5 4.6 1.6Pink-footed Goose ≤3.6 ≤28.5 27.5 3.6 4.6 3.6 1.6 ≤3.6 ≤1.6 ≤19.5 ≤26.5 ≤25.5Common Eider 13.6 2.6 24.6 29.6 11.6 10.6 12.6 12.6 17.6 4.6 12.6 21.6King Eider 12.6 4.6 15.6 16.6 ≤22.6 9.6 11.6 ≤13.6 14.6 21.6 12.6 22.6Long-tailed Duck ≤1.6 30.5 2.6 6.6 6.6 7.6 3.6 7.6 2.6 1.6 7.6 5.6Red-necked Phalarope 5.6 30.5 5.6 10.6 7.6 4.6 5.6 11.6 ≤1.6 27.5 6.6 28.5TABLE 4. Median first egg dates for waders at Zackenberg 2007 as estimated from incomplete clutches, egg floating,hatching dates, as well as weights and observed sizes of pulli.* Based on observations of a single fledgling.Species Median date Range NCommon Ringed Plover 23 May 23 May 1Red Knot 6.5 June 2.6-21.6 10Sanderling 15 June 5.6-4.7 48Dunlin 15 June 6.6-2.7 17Ruddy Turnstone 7 June 5.6-21.6 13TABLE 5. Snow cover on 10 June together with median first egg dates in June for waders at Zackenberg 1995-2007. Data based on