A (county level) can be in natural habitats of migratory birds.Logical formLearned from2 sentences. Natural habitats can be constituted-of-or-filled-with migratory birds.Logical formLearned from2 sentences. Migratory birds may undergo involvement.Logical formLearned from2 sentences. A warning can be against movement of migratory birds.Logical formLearned from2 sentences. A winter may result in migratory birds.Logical formLearned from2 sentences. Migratory birds may stay in an area.Logical formLearned from2 sentences. Migratory birds can be as a cause of outbreak.Logical formLearned from2 sentences. Some migratory birds may die from a disease.Logical formLearned from2 sentences. Migratory birds may survive for some weeks.Logical formLearned from2 sentences. A natural habitat can be for migratory birds.Logical formLearned from2 sentences. A sanctuary can be for hundreds of thousands of migratory birds.Logical formLearned from2 sentences. Migratory birds can be between a continental-region.Logical formLearned from2 sentences. (Bird flu outbreak) can be among migratory birds.Logical formLearned from2 sentences. Migratory birds may be reported.Logical formLearned from2 sentences. A country may report a case of migratory birds.Logical formLearned from2 sentences.