[The occurrence of conjunctivitis of unknown etiology in budgerigars (Melopsittacus undulatus, Shaw 1805)].

The present paper describes a previously unrecorded conjunctivitis of unknown etiology in the budgerigar. Clinical observation reveals close parallels with "cockatiel conjunctivitis". This disease of the cockatiel is often associated with respiratory symptoms. Clinical and pathological features, as well as therapy of the disease are discussed.