female variable hawk, geranoaetus polyosoma , rio negro province,

accipitridae america argentina aura beautiful biodiversity bird birdwatching black brazil cathartes endangered forest geranoaetus grassland hawk head hunter ibera jungle madryn magnirostris marshes national natural nice pantanal park patagonia photography polyosoma predator puerto raptor raven red roadside rupornis scavenger south species variable vulture wetland wildlife