A study on the conservation status of bird fauna of South West of Omo National Park (SWONP), South Western Ethiopia was conducted for dry (January - March, 2012) and wet (April - June, 2012) seasons. The study area was stratified based on vegetation (Riverine Forest land (RFL), Grass land (GL), and Bush land (BL)). Using systematic sampling, data was collected on birds in the morning (6:30 - 10:00 am) and evening (4.00 - 6:00 pm) for five days per week. A total of 129 species belonging to 96.12% were resident species and 3.8% were migratory. Among resident species Psalidoprocne pristoptera, Cecropis abyssinica and Hirundo smithii were the most common species and among migratory Coracias abyssinicus, Merops supercilosus, Clamator levaillantii, Locustella naevia and Tringa glareola were fairly common species. According to IUCN category, 109 species (83%) were Least Concern, 17 species (13%) have not yet been assessed, 3 species (2%) were vulnerable, 2 species (1%) were endangered and 1 species (1%) was near threatened for their conservation status. Of all recorded avian species based on their feeding assemblage status, 59 species (45.7%) were recorded to be insectivores, 30 species (23.3%) were recorded to be frugivores, 23 species (17.8%) were recorded to be insectivores-frugvores and 17 species (13.2%) were recorded to be omnivores. Vegetation structure complexity and season played great role on the species status, abundance and feeding assemblage status.
Key words: Species status, habitat, vegetation, season.