This is a list of the bird species recorded in East Timor. The avifauna of East Timor include a total of 289 species.
This list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) follow the conventions of The Clements Checklist of the Birds of the World, 2022 edition. The family accounts at the beginning of each heading reflect this taxonomy, as do the species counts found in each family account. Introduced and accidental species are included in the total counts for East Timor.
The following tags have been used to highlight several categories, but not all species fall into one of these categories. Those that do not are commonly occurring native species.