Migration 2
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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

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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


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