• Uganda Woodland-WarblerPhylloscopus budongoensis
• Ultramarine FlycatcherFicedula superciliaris
• Ultramarine GrosbeakCyanoloxia brissonii
• Undulated AntpittaGrallaria squamigera
• Undulated AntshrikeFrederickena unduliger
• Undulated TinamouCrypturellus undulatus
• Unicolored AntwrenMyrmotherula unicolor
• Unicolored BlackbirdAgelasticus cyanopus
• Unicolored JayAphelocoma unicolor
• Unicolored TapaculoScytalopus unicolor
• Uniform AntshrikeThamnophilus unicolor
• Uniform CrakeAmaurolimnas concolor
• Uniform FinchHaplospiza unicolor
• Uniform TreehunterThripadectes ignobilis
• Uniform WoodcreeperHylexetastes uniformis
• Unspotted Saw-whet OwlAegolius ridgwayi
• Unstreaked Tit-TyrantUromyias agraphia
• Upcher's WarblerHippolais languida
• Upland AntshrikeThamnophilus aroyae
• Upland GooseChloephaga picta
• Upland PipitAnthus sylvanus
• Upland SandpiperBartramia longicauda
• Ural OwlStrix uralensis
• Urrao AntpittaGrallaria urraoensis
• Urubamba AntpittaGrallaria occabambae
• Utcubamba TapaculoScytalopus intermedius