Figure 1. Median location estimates for two adult male Arctic Warblers from summer to spring (A). Space use maps account for uncertainty in position during migration (top B and C) and winter (bottom B and C) based on our Bayesian state-space modeling approach. The color of the line and the space use maps are the same among individuals (green = 1760-53520 and blue = 1780-52921). Step length and bearing were estimated for each individual, and a movement model was used to improve location estimates from these light-logging geolocators. Photo: Alan Schmierer (CC 1.0).