Migratory birds may carry h5n1s.Logical formLearned from1 sentences. The breeding ground can be for some migratory birds.Logical formLearned from1 sentences. Some migratory birds can be from a continent.Logical formLearned from1 sentences. (Deer herds) can be migratory.Logical formLearned from1 sentences. Migratory birds may spread (bird flu).Logical formLearned from1 sentences. Infections may be found among migratory birds.Logical formLearned from1 sentences. Migratory birds may use as sites.Logical formLearned from1 sentences. Migratory birds can be (virus carrier).Logical formLearned from1 sentences. Migratory birds can be sufficient.Logical formLearned from1 sentences. A pack can be migratory.Logical formLearned from1 sentences. Migratory birds may fly thousands of miles.Logical formLearned from1 sentences. (Poultry flocks) may contract a (bird flu) from migratory waterfowl.Logical formLearned from1 sentences. Presence can be in migratory birds.Logical formLearned from1 sentences. A virus may pass between migratory birds.Logical formLearned from1 sentences. Migratory waterfowl can be at a (nature reserve).Logical formLearned from1 sentences.