Figure 4: Puffin tracks and associated moult periods. Each plot represents one individual and their mean moult locations, with a track derived from each logger. Geolocator positioning accuracy is reduced around the equinoxes, negatively affecting the latitudinal accuracy of moult locations, which were all inferred to occur around the equinoxes. The red dot corresponds to the colony location, Skomer, Wales. Note that portions of the track apparently crossing land are products of the inaccuracy of geolocator location estimates around the equinoxes, and associated smoothing.
Table 2: Metrics for each dual-equipped bird relating to migratory effort and moult periods. Residencies were described using Lavielle segmentation of net-sqaured displacement from the colony. Number of inferred moult periods and time spent in inferred moult altogether are also shown.