This is a list of the bird species recorded in Lithuania. The avifauna of Lithuania include a total of 396 species, of which 5 have been introduced by human. 21 species are globally threatened.
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 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 Lithuania.
The following tags have been used to highlight several categories. The commonly occurring native species do not fall into any of these categories.
- (A) Accidental - a species that rarely or accidentally occurs in Lithuania
- (I) Introduced - a species introduced to Lithuania as a consequence, direct or indirect, of human actions
- (Ex) Extirpated - a species that no longer occurs in Lithuania although populations exist elsewhere