An adult yellow-legged gull (Larus michahellis) of unknown sex was evaluated with history of motor vehicle trauma and unable to fly. The patient, that on first examination showed no clinical sign, was diagnosed on second day with scapulohumeral luxation and avulsion fracture via 3dimensional computed tomography. Computed tomography (CT) is a noninvasive, wellrecognized diagnostic procedure in avian medicine. This is the first case report to describe use of computed tomography to diagnosis scapulohumeral luxation and avulsion fracture in a yellowlegged gull (Larus michahellis).