There are no nightingales in Wales either, but that's no reason they wouldn't have a word for them (it doesn't stop English having words for tiger or pelican).

I know someone who's in contact with an expert scholar of the Cornish language. He is, alas, less of an expert in the use of e-mail, but I'm sure communication can be established, and I will report back if he has anything of interest to add.

This is all turning out to be quite interesting.

Marje