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desert bugs - Top That! Publishing

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How does a caterpillar see its food<br />

Caterpillars live among<br />

their food so don’t need<br />

to look far to find the<br />

next tasty leaf. They<br />

have simple eyes so<br />

their eyesight is not<br />

very sharp – just good<br />

enough to make out<br />

light and shade.<br />

Can insects see things that we can’t<br />

Yes they can! Many insects can see ultraviolet light –<br />

the invisible light from the sun that humans and other<br />

animals cannot see. Many flowers rely on insects to<br />

pollinate them, and the petals of these flowers are often<br />

A flower taken<br />

with a normal<br />

camera (left)<br />

and an<br />

ultraviolet<br />

camera showing<br />

how an insect<br />

might see it.<br />

60<br />

A caterpillar’s simple<br />

eyes allow it to<br />

distinguish between<br />

light and shade.<br />

coloured in ultraviolet patterns that we humans can’t<br />

see. These patterns act like runways, directing the<br />

hungry insects straight into the flower’s centre, and to<br />

their dinner! This in turn pollinates the flower.

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