Bec de Corbin, or Beak of the crow, is a long pole with the head of . .. you guess it, a crow. Different versions vary but the one I learned about has a point on the end, what looks like a beak comes off it and opposite the beak are three sharp pieces of metal that look like a crows foot OR could also be blunt like a hammer.
While the head was used spear like, the beak was most useful for tearing armor apart.
I do not own a picture of this weapon but there are plenty of pictures to see on Google.
*Disclaimer: I have done extensive research on each of these weapons. I am aware that there are many different versions of each of these weapons. I am not trying to spread false information. If you know and can prove any information wrong, please let me know and I will fix my errors. I have at least three references for all research on the weapons I will discuss through the challenge.