A country can be on a route of migratory birds.Logical formLearned from2 sentences. Migratory birds may undergo a testing.Logical formLearned from2 sentences. A migratory bird may carry a virus.Logical formLearned from2 sentences. Some migratory birds may be infected with (bird flu).Logical formLearned from2 sentences. Migratory birds may undergo a mingling.Logical formLearned from2 sentences. Crossroads can be for migratory birds.Logical formLearned from2 sentences. Migratory birds may spread a (bird flu virus).Logical formLearned from2 sentences. A likelihood of migratory birds may increase.Logical formLearned from2 sentences. (Bird flu) can be from migratory birds.Logical formLearned from2 sentences. (Stopover areas) can be for migratory birds.Logical formLearned from2 sentences. Migratory birds may bring a disease from a continent.Logical formLearned from2 sentences. Areas can be popular with migratory birds.Logical formLearned from2 sentences. A path can be for migratory birds.Logical formLearned from2 sentences. A (landing spot) can be for some migratory birds.Logical formLearned from2 sentences. A (resting place) can be for migratory birds.Logical formLearned from2 sentences.