Individual encounter histories of red knots during 4 seasons

The datafile contains the encounter histories of 348 individually marked adult red knots (Calidris canutus, primarily of the subspecies piersmai) that were resighted at their primary non-breeding area Roebuck Bay and during spring stopover, in Bohai Bay (China) between May 2009 and April 2013. All birds were caught in Roebuck Bay using cannon-netting, individually marked with 4 coloured bands and a flag and instantly released. To estimate survival during four seasons, the resightings were pooled into four periods: Jul-Oct, Nov-Feb and Mar-Apr in Roebuck Bay and April-June in Bohai Bay (China). The median dates of resightings during these four periods, rounded to the 1st of the month, were 1 Oct, 1 Jan, 1 Apr and 15 May, hence the intervals over which survival rates were estimated were approximately 3, 3, 1.5 and 4.5 months. The encounter histories start with the first sighting of an individual at spring stopover in Bohai Bay. In subsequent resighting periods, the individual can either be seen (1) or not seen (0).