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Migration - 2. 8 May 2012. Quick quiz. Wrybill has a uniquely ______ bill Wrybill winter in the __________ island Caribou migrate to _________in spring when calves are born Migration is a r_________ activity Migration involves p___________

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migration 2

Migration - 2

8 May 2012

quick quiz
Quick quiz
  • Wrybill has a uniquely ______ bill
  • Wrybill winter in the __________ island
  • Caribou migrate to _________in spring when calves are born
  • Migration is a r_________ activity
  • Migration involves p___________
  • Animals are able to n_________ to find their way
  • Bar tailed godwit migrates to A______ to breed
  • Migration is costly in term of ___________
  • Animals sense changes in the environment through s_______ cells
  • Sports question: What was the score for the Nuggets v Pirates at the weekend
migrations are
Migrations are:
  • active... that is it’s not a passive decision
  • usually movements to a feeding/and or breeding area
  • usually two way trip
  • usually have regular timing
  • often long distance
  • often occur at a definitive stage in life cycle
class definition
Class definition

Migration is the movement of a population to a new environment to better chances of survival, it occurs seasonally because it is routine and because it is genetically programmed within the organism

migration definition
Migration - Definition
  • Migration is an active, regularlyrepeated movement in a particular direction by a populationof animals.
when to migrate how do they know when to go
When to migrateHow do they know when to go?
  • Seasonal
  • Day length
  • Body clock – triggered by light response
  • Pituitary gland is stimulated
  • In birds part of the brain (the pineal) monitors day length

Migrate when they receive environmental stimulus (i)

how do they find their way
How do they find their way?
  • Some young hitch a lift with older animals who have made the journey before
  • Others have to make the trip without any prior knowledge
  • Animal compasses
    • Sun
    • Stars
    • Magnetic

Often use more than one

quick write
Quick write
  • Discuss the significance of migration by describing and explaining. Elaborate your answer with an examples ( one each of bird, mammal)

Key words

  • Navigation, Orientation (different types), migration, risks, benefits

A = describe: M = explain using E = significance