The most recent inventory of the birds known from Alaska discussed 448 species and an additional 110 subspecies of birds recorded through 1996 (Gibson and Kessel 1997). In the 18 years since, many additional species and subspecies have been recorded in Alaska, and molecular studies have brought profound taxonomic changes that supplant many previous perceptions of avian relationships based primarily on morphology. In addition to species and subspecies new to Alaska, we outline here and provide literature citations for all recent changes in the families, genera, species, and subspecies of Alaska birds since the 1997 inventory. We include 505 naturally occurring species and an additional 114 subspecies known from Alaska through 2014.