wait
okay so there's this South American bird, seriema. The generic name is Chunga. I can't find anything about the origins for the scientific or common name.
Unclear fossil record but it's theorized they're related to phorusracids, really big "terror birds"
which would make something like Phorusracos or Kelenken BIG CHUNGAS.
@Leucrotta MEGACHUNGAS!