Flightless bird Flightless bird Flightless birds are birds that through evolution lost the ability to fly. There are over 60 extant species including the well known ratites (ostrich, emu, cassowary, rhea and kiwi) and penguins. The smallest flightless bird is the Inaccessible Island rail (length 12.5 cm, weight 34.7 g). The largest (both heaviest and tallest) flightless bird, which is also the largest living bird, is the ostrich (2.7 m, 156 kg). Ostriches are farmed for their decorative feathers, meat and their skins, which are used to make leather. Many domesticated birds, such as the domestic chicken and domestic duck, have lost
Northern jacana territory. This bird lays a clutch of four brown eggs with black markings. These eggs usually measure around . The male incubates the eggs for 28 days. A female may sometimes shade and squat over the eggs but rarely incubate them. A female may reluctantly incubate the eggs if a male doesn’t have sufficient time to forage throughout the day due to rain and cool temperatures. Males spend most of their time within their territory during incubation but sometimes leave the nest unattended for long periods of time. A male performs when each egg hatches and stands next to the