This is a list of the bird species recorded in Guam. The avifauna of Guam include a total of 146 species as of August 2021, according to Bird Checklists of the World. Of them, eight have been introduced by humans and 32 are rare or accidental. 3 species are endemic, of which one is extinct and two are extinct in the wild though their reintroductions are either in progress or planned. Five species have been extirpated. The following tags have been used to highlight several categories of occurrence.