Minoan Bird Motif Vessel

Looking at this Minoan ouring Vessel I find myself wondering what the Minoans were using to apply color? The curved liens suggest some kind of brush but of what materials?

I do wonder if using a different kind of tool to apply colors might also be an explanation for the reversion to a more geometric style after the fall of Knossos and Mycenae. Or perhaps whichever animal the hairs came from for Minoan brushes was over hunted and came near to extinction?

Its splendid work matching the curves of the vessel and makes me wish more Minoan frescoes survived apart from Thera and Knossos so we could see more examples of Minoan painting.