The Sewing Bird. Seen in a local museum, Pilgrim Monument/Provincetown Museum.
Clamped to a table to hold fabric taut in the days before the sewing machine. Squeezing the bird's tail opened the jaws.
Often given to a bride months before the wedding, so she could sew, sew, sew all those household and personal items she would need to set up house.
Had never seen one before, but found lots of listings on the internet. Quite the collectible.