Notes: Large, wholly black w. long wings, tail. obvious long
throat hackles forming a beard reaching upper breast. Iris white. Juvenile
iris blue-grey; immature iris brown. Ssp perplexus is slightly smaller
than nominate coronoides, w. slightly shorter hackles. Voice: powerful slow
drawn-out high-pitched wail; also a gravelly rattle. Ssp perplexus call
more like Little Raven. Immature
& juvenile form flocks. Noisy, conspicuous.