Fig. 1

Daily distance (in km) between the four fledgling Chaco eagles (Buteogallus coronatus) and their corresponding mothers (sorted from A to D, and corresponding to the same letters in Fig. 2), all GPS-tagged, during the first months after abandoning the nest (time in days). The vertical lines indicate the estimations from three different methods. Red = Method 22, displacement rate-based (highest C.V. of the distances to nest of the bird of 3 days, based on a previous method—Method 18—Table 1) [28, 29]; grey = reference benchmark, visual (abrupt change in the distances between fledgling and mother, used for comparison); blue = Method 29, ranging-area based, and created in our study (first record of week’s/last week’s ranging areas of the bird ≥ 20, best method according to data, Table 1). For a better visualization of the data, the first 100 days after fledgling have been omitted in the X-axis