yellow-billed tit-tyrant Anairetes flavirostris

Active little bird of scrubby and brushy habitats in drier regions of the Andes and locally in the lowlands of Argentina. Often in pairs, hopping in bushes and weeds and can be difficult to see well. Best identified by bold blackish striping on breast and wispy black crest. Note the base of bill is bright orange (not yellow!), but difficult to see in the field.