Bird Migration

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Its an unsolved Puzzle

Bird Migration

  1. 1. BIRD MIGRATION Soham Sabnis [email_address]
  2. 2. What is migration??? <ul><li>“ Change of habitat, periodically recurring and alternating in direction, which tends to secure optimum environmental conditions at all times” </li></ul><ul><li>- Landsborrough Thomson </li></ul>
  3. 3. Past Beliefs…. <ul><li>Beliefs of our ancestors are not only amusing but also away from reality. </li></ul><ul><li>The seasonal appearance and disappearance of certain bird species was evident </li></ul><ul><li>Lets look at couple of fanciful theories of past!!.. </li></ul>
  4. 4. <ul><li>TRANSMUTATION OF BIRDS- </li></ul><ul><li>Resident redstarts in Greece transformed into similar sized robins in winter and hence were not seen at that particular season </li></ul><ul><li>HIBERNATION </li></ul><ul><li>Several European birds hibernate in reed beds in the winter. They slowly sink and get buried in the mud to sleep in winter </li></ul>
  5. 5. <ul><li>What was correct?????????????? </li></ul><ul><li>Seasonal appearance </li></ul><ul><li>Disappearance </li></ul>
  6. 6. WHY DO BIRDS MIGRATE? <ul><li>CHANGE IN TEMPERATURE </li></ul><ul><li>EVOLUTIONARY REASON </li></ul><ul><li>CYCLES OF GLACIATION </li></ul><ul><li>MOLTING </li></ul><ul><li>RESTRICTED DIET CHOICES </li></ul>
  7. 8. PATTERNS OF MIGRATION <ul><li>PARTIAL MIGRATION </li></ul><ul><li>DIFFERENTIAL MIGRATION </li></ul><ul><li>LOOP MIGRATION </li></ul><ul><li>LEAPFROG MIGRATION </li></ul><ul><li>IRRUPTIONS </li></ul><ul><li>INTER-POLAR MIGRATION </li></ul><ul><li>ALTITUDINAL MIGRATION </li></ul>
  8. 12. PREPARATIONS FOR THE JOURNEY
  9. 14. <ul><li>FUEL FOR THE JOURNEY </li></ul><ul><li>THE MOLT </li></ul><ul><li>MOTIVE TO MOVE </li></ul><ul><li>TIME TO GO </li></ul><ul><li>WHEN TO FLY???---NIGHT OR DAY??? </li></ul>
  10. 15. molt
  11. 16. FINDING THE WAY…. <ul><li>NAVIGATION </li></ul><ul><li>PILOTING WITH A BIRD EYE VIEW </li></ul><ul><li>SUN COMPASS </li></ul><ul><li>STAR COMPASS </li></ul><ul><li>MAGNETIC COMPASS </li></ul><ul><li>PROGRAMMED ROUTES </li></ul><ul><li>“ PUTTING IT ALL TOGETHER IS REALLY CRUCIAL” </li></ul>
  12. 19. <ul><li>MAKING SUCCESS OF FAILURE…… </li></ul><ul><li>-Raw material </li></ul><ul><li>for evolution </li></ul><ul><li>-Extend ranges </li></ul><ul><li>- </li></ul>
  13. 20. Flight Plans <ul><li>Planning the journey </li></ul><ul><li>Difficult crossings </li></ul><ul><li>The greatest barrier-1000 miles </li></ul><ul><li>Speed of flight </li></ul><ul><li>Economy travel </li></ul><ul><li>Staging posts </li></ul>
  14. 21. HAZARDS AND DELAYS <ul><li>Bad weather </li></ul><ul><li>Man made obstacles </li></ul><ul><li>Going the wrong way </li></ul><ul><li>Predation pressure </li></ul><ul><li>Human threats </li></ul>
  15. 24. <ul><li>THE RETURN… …… </li></ul>
  16. 25. <ul><li>RACE TO GET BACK </li></ul><ul><li>ON THEIR MARKS </li></ul><ul><li>EARLY RETURS </li></ul><ul><li>RETURNING SEQUENCE </li></ul>
  17. 26. <ul><li>MIGRATION HAS GIVEN BIRDS OPPORTUNITY TO EXPLOIT FUNDAMENTAL PROPERTY OF LIFE ON EARTH </li></ul>
  18. 27. M.L.P.K.M
  19. 28. Migration champs
  20. 31. Look at the bird Up in the treetop, Building its nest With no time to stop. Hatching its eggs So smooth and so round, Then feeding its babies Worms from the ground. Look at the bird With beak for a mouth. When it gets cold, The bird will fly south. When it gets warm, The bird will return. Let's watch how the birds live, And see what we learn.
  21. 32. <ul><li>THANK YOU </li></ul>

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