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A yellow-headed caracara (Milvago chimachima) on the back of a capybara (Hydrochoeris hydrochaeris) in the Pantanal in the State of Mato Grosso do Sul, Brazil. Caracaras are a type of falcon that typically scavenge for their food, while capybaras are the largest rodents in the world.Photograph: Charles J. Sharp
 | This picture of the day has been featured on Portal:Mammals. |