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This Concept Map, created with IHMC CmapTools, has information related to: Purple Martins (primary article) 090716, males arrive first to breeding site and don't wait for a mate (that may not arrive, due to death rate of 40%), Purple Martins (a bird) pairs may "divorce" during the breeding season, Purple Martins (a bird) migrate transhemispherically between North America (to breed) and the Amazon basin (to "overwinter"), non-synchronously (when considering "mated" pairs) in their in their overwintering site location (first roosting site) (Fig. 1c) & arrival time, non-synchronously (when considering "mated" pairs) in their arrival to the breeding site (time & location), arrival to the breeding site (time & location) in that 11 of 12 mated pairs arrived at different times (Fig. 1a & 1c), in their overwintering site location (first roosting site) (Fig. 1c) & arrival time in that that 11 of 12 pairs arrived to the overwintering site at different times (fig. 1c &2) and different "first roosts" (fig 1c), Southeeast stopover locations (fig. 1b & 2) & timing (fig. 1b &2) in that mated pairs were not close to each other in location & time during their south-east migration to their overwintering sites (Fig. 2), divorce in Purple Martin because males arrive first to breeding site, non-synchronously (when considering "mated" pairs) in their departure date from their breeding site (figure 1a), "divorce" during the breeding season leading to "non-synchronous" migration (of the formerly mated pair), non-synchronously (when considering "mated" pairs) leading to divorce in Purple Martin, arrival to the breeding site (time & location) in that 11 of 12 mated pairs arrived at different locations (Fig. 1c), Purple Martins (a bird) migrate non-synchronously (when considering "mated" pairs), non-synchronously (when considering "mated" pairs) in their Southeeast stopover locations (fig. 1b & 2) & timing (fig. 1b &2)