Sources : Kyches

Thomas of Cantimpré [circa 1200-1272 CE] (Liber de natura rerum, Birds 5.73): Kyches is a bird, as Aristotle says, that cries with different voices and changes its voice almost every day. It makes nests of wool and hair on trees, and there it lays eggs. When the grain is early, it gathers it in a sufficient quantity for food. When the chicks are brought up and strengthened for flight, they feed their parents in their old age, and allow them to remain in the nests without any labor. - [Badke translation/paraphrase]