Hibernation & Migration

7/29/2019 Hibernation & Migration

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Hibernation and

MigrationWALT: to know what migration andhibernation is

WILF: to recall key factsCollate information about bird migration


2/17

Adaptation

People are always having to adapt orchange to different situations

For animals adaptation can be amatter of life and death

How do we adapt when winter comes?


3/17

How do animals prepare

for winter? Some head for

warmer climates-

migration Some will put on a

thick coat of fur

Some animals headunderground for along winters nap


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What is hibernation?

This is a veryspecial kind of deep

sleep It is brought on by

short day lengths,cold temperatures

and food shortages


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Why do animals

hibernate? It is a survival strategy

Dropping into a deep hibernation

means animals are using less energy

Food is scarce

Animals miss the cold seasons


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What are the dangers of

hibernation? The animal is

defenceless, which

means it maybeattacked bypredators andeaten!


7/17

How do animals prepare

for hibernation? They try to put on as much fat as possible

because they wont be eating much during

the winter This is called brown fat, which is found

across the back and shoulders, close to ananimals organs

Brown fat works hard to deliver quickenergy to an animal coming out ofhibernation


8/17

Light Sleepers

Some animals are not true hibernators

They are easily awakened during their

winter slumbers These animals breathe a little more slowly

and lower their body temperature a fewdegrees

The wake up to forage between wintersnows

Bears, skunks, raccoons
http://www.animations.com/en/search/close-up.mc?&oid=2906356&s=1&sc=17&st=17&spage=1&hoid=f81556c08ea49750c6334a1177b82fb6


9/17

Can you think of any

animals that hibernate?Bear

hedgehog

Ladybird

Snake

SquirrelsBats


10/17

Adder

Snakes cannot control theirbody heat so the only waythey can survive in coldweather is to go into

hibernation Hibernate from October to

April They will often go

underground , in desertedrabbit or rodent burrows

They sometimes hibernatein groups and over 800adders were once foundhibernating together


11/17

As the days get longer and warmeradders begin to wake up

Males sometimes emerge between 2and 5 weeks before the females, theyshed their skin before setting off insearch of a mate

Fact: Adders are the only venomoussnake in Britain!


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Hedgehogs

Hedgehogs hibernatefor 5 or 6 monthsduring the winter

They prepare for theirlong sleep by eatinglots of food

They build nests fromleaves and grass inrabbit burrow,hedgerows andunderneath compostheaps
http://www.bbc.co.uk/nature/reallywild/features/tts_hedgehog.shtml


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The leafy walls can be ten centimetresthick and provide great insulation from

the cold While theyre asleep their heartbeat

goes down from 190 to about 20 beatsper minute

Body temperature drops to about 10degrees C


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You might think that most hedgehogdeaths are caused by cars

More hedgehogs die duringhibernations

They cant protect themselves from

rain, flooding, the cold or lack ofenergy if their fat reserves run out


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Ladybirds

When their food supplygets scarce and the

temperature dropsladybirds find a shelteredspot

Ladybirds stock up on food

before hand


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You will find ladybirds under leaf litter,among dead grasses and under stones

2 spot ladybirds hibernate inside your

house. They may form groups of up to 1000

individuals They hide in cracks round window frames,

inside lofts and under loose stonework andbetween roof tiles


17/17

Recap

How do animals prepare for winter?

What is hibernation and why do

animals hibernate?

Identify some animals that hibernate

What are some dangers ofhibernation?

Documents

Hibernation & Migration