All illustrations by Alan Batley

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1

Find a clear print. Press a circular 'collar' around it made from cardboard or a section of plastic bottle.

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2

Mix some plaster of Paris to the consistency of pancake batter. Let the air bubbles rise.

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3

Pour the mix carefully over the print. Fill the collar to 10mm above the highest point, and leave for 30 minutes.

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4

Prise up the cast (dig away the soil around it to help). Allow it to set firmly, then you can wash and paint it.

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Authors

Sarah McPhersonFeatures editor, BBC Wildlife Magazine
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