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  • 1. Ch. 5 Sec. 3Tracking Migrations
  • 2. electronic tags• give off repeating signals - picked up by radio devices or satellites• track locations & movements of tagged animals w/out recapturing them
  • 3. receiverpicks up signal
  • 4. satellite instrument inorbit 1000’s km above Earth
  • 5. • tracking migrations - important tool to better understand & protect species