> I do not find anything in Pokorny.Are there PIE radicals for
> bill (germ. Schnabel)
> claw (germ. Kralle)
> crow ( germ. Kraehe)
You can have a first bash at answering questions like this through the
English-PIE list I have posted in the list-members site. It gives basic
roots only (not extensions) and as with any dictionary, you'll have to look
under more than one English synonym to check thoroughly.
I've done this for the words you ask about, and I don't find anything
equivalent in PIE, although there are some bird noises.
Peter