Although rayaditos were historically thought to be multi-brooded, the first detailed breeding studies conducted on Chiloé suggest each pair typically raises only a single clutch per year, and that reduction of clutches after laying by discarding eggs is not unknown, though brood reduction by this method has generally been exceptionally rarely seen and thought to be absent from south temperate passerines. Growth of nestlings is distinctly slow: fledging lasts twenty-one days and postfledging parental care around thirty days. The latter is distinctly longer than in north temperate species at the same distance from the equator, but not nearly so long as in many tropical, Australian and southern African passerines where young are not independent for over sixty days. Rayaditos may travel with their parents during the non-breeding season though this is not yet investigated. The oldest known rayadito based on banding studies was six years and four months old, though potential longevity is unknown.