TECHNIQUES FOR STUDYING MIGRATION 7 Direct Observation 7 Aural 8 Preserved Specimens 8 Marking 8 Bands, Collars, Streamers 8 Radio Tracking 10 Radar Observation 10 Laboratory 11 Orientation and Navigation 11 Physiology of Migration 11 WHEN BIRDS MIGRATE 17 Time of Year 17 Time of Da…
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