The ends of some pendants are slightly hooked, although this is not apparent on the image.
And now, allow me a boutade: they feel like they belong to the same animal...
Mmmm, for a while I was wondering whether thay belonged or not to a sea turtle...or one of those sea monsters, akin to whales?
Also, as it can be seen, the bones are empty -- as expected from birds.
I am glad someone puts some academic discipline into the issue, thank you, Jamey: I am frivolous!