This is a local and generally uncommon bird along the upper Amazon. They have a peculiar distribution being found in Peru and Brazil only along the Amazon and its tributaries where they seem to specialize in river-created islands. This is a male. Females are browner. Like many Icterids, this species is polygynous with males mating with more than one female. However, unlike other blackbird species, only the male builds the nest. Canon PowerShot SX60 HS.
References:
Fraga, R. (2019). Yellow-hooded Blackbird (Chrysomus icterocephalus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/62314 on 30 June 2019).
Yellow-hooded Blackbird (Chrysomus icterocephalus), In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. retrieved from Neotropical Birds Online: https://neotropical.birds.cornell.edu/Species-Account/nb/species/yehbla2