Hedgerow Life 
earth, it is peculiar in having a separate 
sheath or beak for the tongue, which 
in the moth is very long and rolled up 
like a watch-spring. Others nearly as 
large live also on the willows in hedges. 
The eyed-hawk caterpillar is green with 
white stripes, and the  poplar-hawk 
green with yellowish stripes, and they 
both bear horns on their tails. The 
willow (and the sallow, which is a form 
of willow) is such a favourite food for 
these large and interesting caterpillars 
that it is worth while searching carefully 
for them at the end of the summer, 
about August or September. Perhaps 
the best way to find them is by shaking 
the branches hard over an umbrella 
turned upside-down on the ground 
beneath. You must shake hard, because 
they can cling on very tightly, and they 
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