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 SEGREGATION DURING MIGRATION 35 By Individuals or Groups of Species 35 By Age 36 By Sex 38 By Kinds of Flocks 40…
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