Poultry can be in migratory birds.Logical formLearned from2 sentences. Flightpaths can be for migratory birds.Logical formLearned from2 sentences. (Whooper swans) can be migratory.Logical formLearned from2 sentences. Paths can be for migratory birds.Logical formLearned from2 sentences. A risk may be posed by migratory birds.Logical formLearned from2 sentences. Migratory birds can be from the north.Logical formLearned from2 sentences. Migratory birds may begin a movement.Logical formLearned from2 sentences. Migratory birds can be through a continental-region.Logical formLearned from2 sentences. Movements of migratory birds may pose threats to a continent.Logical formLearned from2 sentences. Thousands of migratory birds may die in a hill.Logical formLearned from2 sentences. Migratory birds may pass.Logical formLearned from2 sentences. A network can be for monitorring migratory birds.Logical formLearned from2 sentences. A route may pertain-to migratory birds.Logical formLearned from2 sentences. An abnormality can be in migratory birds.Logical formLearned from2 sentences. Pathways can be constituted-of-or-filled-with migratory birds.Logical formLearned from2 sentences.