i have started the legs of the oystercatcher making them from pink twine found on the beach. when trying to find images of the birds legs and feet i came across some information on damage to oystercatchers legs and feet from sheeps wool
'One of the distressing aspects of getting close to Oystercatchers is discovering the high proportion that have injuries to their feet and legs, caused by their becoming entangled with sheeps' wool on their breeding grounds (mostly in the uplands of England, Scotland, the Faeroe Islands, Iceland and Norway). Sometimes ringers are able to help the birds by removing the wool, but usually it is too late. The birds seem to be able to adapt to this and there are many long-lived examples.'