Fig. 2

Identification of revisited locations and breeding sites among them. Schematic diagram depicting how revisited locations (and breeding sites among them) are identified along individual tracks. a A buffer of user-defined radius r is placed around each location of the trajectory. Buffers that contain any other locations in addition to the one they are centered on are revisited locations. A fraction of these will be breeding sites. b To detect breeding sites specifically, revisited locations are filtered based on their temporal patterns of revisitation using parameter values that are diagnostic of breeding sites. Parameter values can be chosen based on prior knowledge or based on the comparison of known breeding and non-breeding sites with CART