Migratory flight on the Pacific Flyway: strategies and tendencies of wind drift compensation.

摘要: Applications of remote sensing data to monitor bird migration usher a new understanding magnitude and extent movements across entire flyways. Millions birds move through the western USA, yet this region is understudied as migratory corridor. Characterizing in Pacific Flyway offers unique opportunity study complementary patterns those recently highlighted Atlantic Central Flyways. We use weather surveillance radar from spring autumn (1995-2018) examine migrants' behaviours relation winds Flyway. Overall, migrants tended drift on winds, but less so at northern latitudes farther inland coastline. Relationships between flight were striking, with no latitudinal or coastal dependencies. Differences preferred direction movement (PDM) wind predicted during autumn, increased when PDM differences high. also observed greater total activity compared autumn. Such complex relationships among birds' strategies, seasonality highlight variation within system. Characterizations these scales complement our strategies clarify aerial animal movements.