I live close to Dartmoor and you can hear these beautiful birds in the breeding season.  It's always a pleasure to listen to their mournful cries as you know they're back to breed.  The poem reads:
The Curlew, with its mournful cry,
Will breed upon the moor,
Then fly low, through turquoise sky,
To winter on the shore.
It's written in silver to mimic the bird's airflow pattern.  It's painted in gouache, pen and ink, on Two Rivers hand made paper.