Page 111 - One Million Things: Animal Life - The Incredible Visual Guide

Mountain-living
marmot’s size means it
must hibernate in a
burrow during winter

Marmot 6

Cabbage white butterfly

5
7
Daubenton’s bat

European hedgehog

7 DAILY TORPOR
Red-sided garter snake Some smaller animals, such
as hummingbirds and bats,
take time out on a daily basis.
Hummingbirds keep their
6 DIAPAUSE body temperature constant
Chipmunk eats Insects, such as butterflies, go during the day. At night,
large amounts through various stages—egg to when they rest, their body
of food before
hibernating, larva to pupa to adult—during their temperature falls, allowing
storing some in its development. Stages can be delayed them to save energy. Bats
follow the same strategy except
to give the insect the best chance of
winter burrow
Chipmunk survival. This is called diapause. If a that they show torpor during
5 HIBERNATION cabbage white butterfly lays eggs in the day and warm up at night
late summer, development stops at
when hunting for insects.
Mammals are endothermic the pupa stage over winter and
(warm-blooded) and they need starts up again in the spring.
to eat regularly to maintain their
body temperature. In winter, small
mammals such as marmots,
Hard shell
hedgehogs, chipmunks, and bats protects
find this difficult because there is snail as it
little food and they lose heat easily. estivates
To survive, they find shelter and go
into hibernation, during which their
body temperature and heart- and
breathing rates fall dramatically.
Giant land snails
109

(c) 2011 Dorling Kindersley, Inc. All Rights Reserved.

US_108_109_Time_Out.indd 109 12/1/09 12:50:45
108_109_Time_Out.indd 109
5/11/08 11:36:49