Migratory birds may be suspected by some experts.Logical formLearned from2 sentences. A (bird flu virus) may be carried by migratory birds.Logical formLearned from2 sentences. A mechanism can be migratory.Logical formLearned from2 sentences. A stopover can be for millions of migratory birds.Logical formLearned from2 sentences. Migratory birds may travel across a region.Logical formLearned from2 sentences. Migratory locusts can be oriental.Logical formLearned from2 sentences. Jobs can be migratory.Logical formLearned from2 sentences. Challenges can be migratory.Logical formLearned from2 sentences. Millions of migratory birds may fly to an island.Logical formLearned from2 sentences. Crimes can be migratory.Logical formLearned from2 sentences. Sturgeons can be migratory.Logical formLearned from2 sentences. A haven can be for some migratory birds.Logical formLearned from2 sentences. A station can be for migratory birds.Logical formLearned from2 sentences. A crane can be a migratory bird.Logical formLearned from2 sentences. A reserve can be for migratory birds.Logical formLearned from2 sentences.