Fig. 4

Daily variations in window AvODBA (activity) and IWDD (movement), relative to incubation onset (day 1). Breeding stages (prelaying, laying, incubation, and chick rearing) are indicated on top of figures. AvODBA values are presented for males (A) and females (B) of each species separately, to highlight differences between sexes. IWDD values (C) are presented for each species in metres. Note that the duration of the incubation period differs between species (green: Pterocles alchata, PTS; yellow: Pterocles orientalis, BBS)