Parks may be frequented by migratory birds.Logical formLearned from2 sentences. Harm can be to migratory birds.Logical formLearned from2 sentences. Clumps can be constituted-of-or-filled-with migratory birds.Logical formLearned from2 sentences. Migratory birds may miss a cosy.Logical formLearned from2 sentences. Migratory birds may cross a forest.Logical formLearned from2 sentences. Habitats may be used by migratory birds.Logical formLearned from2 sentences. Migratory birds can be from some continents.Logical formLearned from2 sentences. Migratory birds can be from avian influenza.Logical formLearned from2 sentences. Migratory birds can be a target.Logical formLearned from2 sentences. Migratory birds may be killed in collisions.Logical formLearned from2 sentences. Migratory birds may undergo (arrival times).Logical formLearned from2 sentences. A person may study migratory birds.Logical formLearned from2 sentences. Migratory birds may carry a (bird flu virus).Logical formLearned from2 sentences. Researcher may collect thousands of samples from migratory birds.Logical formLearned from2 sentences. A run can be migratory.Logical formLearned from2 sentences.