Figure 4
(a) Clustering of individual birds’ foraging locations. We have identified 5 significant foraging-locations clusters (dashed ellipses, labeled A–E). The foraging locations of each individual are marked by colored dots, with LLB individuals in “warm” shades (magenta-red-brown) and STE individuals in “cool” shades (violet-blue-grey). Nest location for each individual are marked by a triangle (LLB) or a square (STE). Cluster analysis to group foraging locations was conducted using the k-means function in MATLAB. (b) Results of attraction-repulsion analysis of movement patterns between each pair of individual birds using MoveMine49. Individual bird IDs are listed and sorted by species. The figure is symmetric across the diagonal. Color marks the attraction index, varying from 0 (complete avoidance) through 0.5 (mutually random movement pattern) to 1 (complete attraction, coordinated, matching movement patterns). A white (blank) square indicates that these two individuals were never observed at the same year. Most individuals display neutral movement patters to each other, except three LLB individuals that display avoidance toward STE individual 2186, and one pair of LLBs (2183 and 2180) that show matching (attracted) movement patters. This figure was plotted using MATLAB (Mathworks, Natick, MA) version R2015b (http://www.mathworks.com/products/matlab/).
