A route of migratory birds may go through a part of a country.Logical formLearned from2 sentences. A contact can be with migratory birds.Logical formLearned from2 sentences. Migratory birds may fly over a territory.Logical formLearned from2 sentences. A risk can be migratory.Logical formLearned from2 sentences. A person can be concerned about migratory birds.Logical formLearned from2 sentences. Migratory birds can be lethal.Logical formLearned from2 sentences. A rendezvous can be constituted-of-or-filled-with migratory birds.Logical formLearned from2 sentences. Deaths of migratory birds may be caused by a strain of avian flu.Logical formLearned from2 sentences. A country may blame migratory birds.Logical formLearned from2 sentences. Migratory birds can be from a korean peninsula.Logical formLearned from2 sentences. An outbreak may be triggered by migratory birds.Logical formLearned from2 sentences. Migratory birds may fly long distances.Logical formLearned from2 sentences. Migratory bird may be infected with a (killer h5n1 virus).Logical formLearned from2 sentences. Migratory bird may display symptoms of (bird flu).Logical formLearned from2 sentences. Thousands of migratory birds can be prey to poachers.Logical formLearned from2 sentences.