title: Crop lithiasis in a budgerigar.
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000473:pathology*; D002137:Calculi / Q000473:pathology / Q000662:veterinary*; D003426:Crop, Avian; D005260:Female; D010240:Parakeets; D011563:Psittaciformes