Molting is a process that involves periodically replacing feathers in all avian taxa. This process is energetically expensive, and for this reason molt has evolved in most birds to avoid significant temporal overlap with other energy-taxing processes, such as mating and migration. Although the molt sequence of flight feathers varies by species and age class, if the pattern of a particular species is understood, it can provide insight into energetic tradeoffs and facilitate conservation efforts. The Flammulated Owl (Psiloscops flammeolus) is a small, territorial raptor that breeds in the montane forests of western North America and migrates to Mexico and Central America during the winters. While more is known about the breeding and migration processes, feather molt patterns in the species have not yet been studied. In analyzing nine consecutive years of molt observational data collected from Flammulated Owls in their summer breeding grounds in the Pike National Forest, Colorado, I sought to determine the general timeline and sequence of molt in this population among different sex and breeding classes. Additionally, I quantified growth patterns in hatch year birds to clarify the extent to which migration may exert strong selective pressure on development in this species. My results showed that all individuals exhibit one sequential prebasic molt annually that begins in the late breeding season and continues just prior to fall migration. While this pattern appears the same regardless of sex and breeding status, these factors seem to have an effect on the proportion of individuals in molt at any given time within the molt timeline. I found that over two-thirds of non-breeding males were observed molting their primaries at the time of capture compared to about one-third of both breeding males and females – a pattern I hypothesize to be the result of differences in energy allocation. Furthermore, since migratory behavior can impact aspects like behavior, morphology, and energy allocation – all of which can have strong effects on development – understanding the molt and development patterns of a species can provide valuable insight into evolutionary differences between migrant and resident populations.