Fig. 1

Sampling locations and density distributions of observed separation distances. Red dots indicate the vertical trapping locations in apartment buildings in Tampines (a) and Yishun (b). Horizontal violin plots (c) show the density distribution of separation distance for full siblings, 2nd-degree relatives, 3rd-degree relatives, all close kin combined (“all CK”), non-close kin (“all non CK”), null distribution (“non CK random”), and traps. The box within each violin plot shows the interquartile range and the location of the median