A risk can be from migratory birds.Logical formLearned from4 sentences. A relationship can be to migratory birds.Logical formLearned from4 sentences. A bat can be migratory.Logical formLearned from4 sentences. Predators can be migratory.Logical formLearned from4 sentences. Avifaunas can be migratory.Logical formLearned from4 sentences. A corridor can be for migratory birds.Logical formLearned from4 sentences. A study can be constituted-of-or-filled-with migratory birds.Logical formLearned from4 sentences. A state can be migratory.Logical formLearned from4 sentences. Activities can be migratory.Logical formLearned from4 sentences. A waterfowl can be migratory.Logical formLearned from4 sentences. A habit can be migratory.Logical formLearned from4 sentences. Migratory birds can be sick.Logical formLearned from4 sentences. Flocks of migratory birds may bring a (bird flu virus) to a continent.Logical formLearned from4 sentences. Migratory birds may return from a continent.Logical formLearned from4 sentences. Loons can be migratory.Logical formLearned from4 sentences.