As I was slowly moving on the river of Fazenda San Francisco I noticed this black-capped donacobius (Donacobius atricapilla) in a dense thicket on the riverside.
What’s peculiar is the white on its head, which should normally be all black, as well as having a bright and yellow iris.
One possibility is that this is the supspecies albovittatus, the other is that this is a juvenile. Evidently the juveniles of southwestern Brazil temporarily have the white streaks on the head as well as a brown iris..
Thanks to Birdforum.net contributors for clarifications.
It sounds like this:
Last updated on 8 November 2024
