For glueing feathers I use a product called "Fish Glue". In Canada it is sold by Lee Valley Tools http://www.leevalley.com/en/shopping/Instructions.aspx?p=41041 They offer it for using with wood for furniture-making.
I find it dries quickly, remains clear, and holds well. However, it is not water-resistant, nor particularly flexible when dry. It does resemble the glue that was traditionally used on feather pads though.