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
Jurong Bird Park to the public. Jurong Bird Park is now a world-famous bird zoo where there are specimens of magnificent bird life from around the world, including a large flock of flamingos. It is currently the world's largest bird park in terms of the number of birds, and second largest both in the number of bird species and land area (after Germany's Weltvogelpark Walsrode). There are 5,000 birds of 400 species in Jurong Bird Park, of which 29 are of threatened species. In 2006, Jurong Bird Park completed a S$10 million makeover. As a result of the upgrade, the park got a