only since 2008, and there are also scattered eBird records as far north as Guatemala and Belize. Off the north coast of the South American mainland it occurs on Aruba, Trinidad, and Tobago, and has visited Bonaire and Curaçao as a vagrant. The nominate M. c. chimachima is found from eastern Bolivia south through Paraguay into northern Argentina and east through northern Uruguay and Brazil south of the Amazon River. Its range overlaps with that of the chimango caracara in southern Brazil, northern Argentina, Paraguay and Uruguay. The yellow-headed caracara is a bird of lightly-treed open landscapes, like savanna with palms and scattered trees, ranchland and pastures, gallery forest, and the edges of denser forest. In elevation it mostly ranges from sea level to , though it has been recorded at about in Colombia's Cauca River valley. Behavior Movement The yellow-headed caracara is generally sedentary, but records from northern Central America and islands off the north coast of South America indicate that individuals do wander. Within its usual range it colonizes cleared areas. Feeding The yellow-headed caracara is omnivorous and relies heavily on scavenging. Its diet includes carrion, insects (adult and larval), crabs, fish, reptiles, amphibians, mammals, bird eggs and nestlings, horse dung, fruits such as those of oil palm (Elaeis guineensis), coconut, and maize, and seeds. It also takes ticks from cattle and other large mammals like tapirs, and enlarges open wounds. Much of its diet is taken while walking on the ground, but it does some hunting on the wing. It has been observed also to forage for small invertebrates in the fur of brown-throated three-toed sloths. Mixed-species feeding flocks apparently do not regard it as a threat, not making alarm calls during encounters. Breeding The yellow-headed caracara's nesting season varies geographically. It spans December to April in Costa Rica. In Colombia there appear to be two seasons, January to April and July to September. It includes August in Venezuela. Egg laying has been recorded in May in Guyana, in July and August in central Brazil, and in September in southern Brazil. It usually builds a stick nest up to high in a tree or palm, but has also nested in a tree cavity, and in the absence of trees on mounds in marshy areas, on the ground, and even in buckets and cans on the wall of a house. The clutch size has been reported as one