👉 The term "Opisthodiscus" refers to a genus of birds belonging to the family Passeriformes, which includes the common ostrich and other large passerine birds. These birds are distinguished by their long necks that they use for flight, as well as their distinctive bill and beak, which is curved towards their mouth. They are also known for their ability to fly at high speeds and can reach an altitude of around 10,000 meters.