Daily field observations of colour-marked red knots (marked in Northwest Australia) along the Luannan Coast of Bohai Bay, China during spring migration between 2009 and 2016, in matrix format. Column names represent day of the year, ranging from 130 (10 May) until 150 (30 May) and row names represent the year of observation. Each row represents the daily encounter history of one individual in a particular year, where a "0" implies that the individual was not observed during that particular day, and a "1" implies that the individual was observed at least once.