Brazil's bird life carries this sixth chapter of the series Amazonia: Last Call, cataloging species whose behavior and sheer variety surprise even the researchers filming them. The episode follows a team into the field to meet the people and institutions working to protect Brazil's ornithological wealth, including efforts around the blue Azarinha, a bird already sliding toward extinction. Interviews with conservationists and local caretakers sit alongside footage of nesting sites and habitat, framing the birds as a measure of how the wider Amazon basin is holding up. The film keeps returning to the river itself as the connective thread, tracing it from its source in the Andes to its mouth at the Atlantic, a giant among rivers that shapes everything living along its banks. Part of a series that mixes anthropology and ecology, this episode narrows that broader project down to a single question: what happens to a region's biodiversity when its most visible signal, its birds, starts disappearing.