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BIRD MIGRATION
Why do birds migrate?
Birds migrate to move from areas that have low or decreasing resources The two most
important resources being looked for are food and nesting locations.
Birds that nest in the northern hemisphere often migrate towards the north in the spring to
insect populated areas, As winter approaches, and the availability of insects and other food
resources drops, the birds move south again.
Escaping the cold is a motivating factor but many species, including hummingbirds, can
withstand freezing temperatures as long as a supply of food is available.
Southern Royal Albatross
Southern albatross mainly migrate around the
southern ocean and are commonly seen in New
Zealand.
They nest and breed on the Campbell Islands,
Then move south towards Antarctica
Each bird often fly the same migration paths each year
Their migration paths are recorded though satellite,
some fly thousands of kilometres. One bird named
princess Anne flew a total of 6,000 km in about 16 days.
Experts advice
What are the hazards of birds migrating?
Well, when sea birds migrate they need rest stops called
wetlands and most of them are being flooded by the ocean or
destroyed by rubbish caused by us humans. Another reason not
quite as serious but they are easily confused with human
streetlights or bike lights.
How do birds navigate while migrating?
Different birds use a range of techniques like using the magnetic
field. At the centre of the earth there is ball of pressurised
melted burning hot iron. Now it is spinning and creating the
magnetic field. And birds are able to red the magnetic field to
figure out north and south. Also sometimes it is in their DNA and
it just comes naturally.
How do birds prepare to migrate?
Bird preparation for migration is really just eating loads of fat.
And a lot of sleep. Now the reason for eating fat is because it is
lighter and protein Is much more heavy.
Laurence Sullivan( my uncle)
He is a Ecologist he works a
lot with birds and nature.
Push and pull factors.
Push factors.
Pull factors
• Freezing temperatures.
• Lack of food.
• Lack of nesting habitats or
Homing resources.
• Dangerous lifestyle lots of
Hazards.
• Mating and to lay eggs.
• Better nesting habitats resources.
• Humid temperatures.
• More insect populations to take advantage
On.
• Less hazards
• More bird populated areas
REFERENCES
Internet- www.birds.cornell.edu/Allaboutbirds/studying/migration.
https://en.wikipedia.org/wiki/Bird_migration
www.teara.govt.nz/en/bird-migration/page-3
Books – Bird migration written by Betty Brownlie
Expert person- Laurence Sullivan (my uncle)
News – The herald
Written by,
Zekiel Nikoia