Thousands can be constituted-of-or-filled-with migratory birds.Logical formLearned from172 sentences. A bird can be odd.Logical formLearned from171 sentences. Birds can be threatened.Logical formLearned from171 sentences. Birds can be diseased.Logical formLearned from170 sentences. (Bird species) can be endangered.Logical formLearned from169 sentences. Passerine birds can be insectivorous.Logical formLearned from168 sentences. Dozens can be constituted-of-or-filled-with birds.Logical formLearned from168 sentences. Birds may undergo a chirping.Logical formLearned from167 sentences. Birds may be seen.Logical formLearned from167 sentences. A birds may undergo a slaughter.Logical formLearned from167 sentences. Parrots can be birds.Logical formLearned from166 sentences. A bird may be found.Logical formLearned from166 sentences. Birds may undergo a collection.Logical formLearned from166 sentences. A family can be a group of passerine birds.Logical formLearned from165 sentences. Birds can be affected.Logical formLearned from164 sentences.