Birds are found almost everywhere in the world from pole to equator. They occur on land, sea and fresh water, and in every habitat, from the lowest deserts to the highest mountains, and they are used for various purposes in all aspects of life. The present study was carried out in order to determine avian species diversity in Bali town, Taraba State, Nigeria. Field survey was carried out from January, 2016 to January, 2017 in selected areas in Bali town's surrounding vegetations to know the species of birds that are found in these areas. Locations sampled were Sabon-Dale, Angwar Tiv/Mission, Behind Polytechnic Admin. offices (Rest House), Polytechnic Students Hostels, Inside Bali town, Daniya, and Behind Bali River. A total of 65 species of birds belonging to 39 Families, and 17 Orders were surveyed. Order Passeriformes were the most abundance with 16 families (40%) and 26 species(39.39%), followed by Order Columbiformes with one Family (2.5%) and 7 species (10.60%). The Orders Trogoniformes, Procellariformes, Musophagiformes, Caprimulgiformes, Gruiformes, and Suliformes were the least abundance species. Among the birds surveyed, only 10 species were aquatic birds, and were found behind Bali river. Two endemic birds were found, these were Adamawa turtle dove (Streptopelia hypopyrrha) and Prince Raspoli's turaco (Turaco ruspolii) as well as one endangered species Narina trogon (Apaloderma narina). The study showed that Bali town have rich avian fauna which are majorly Passeriformes .The reason for this increase in avian species diversity was due to low rate of urbanization in Bali town, and the presence of abundant grain crops which served as food to the birds, because most of them are pests of crops.