The largest species in the true nightjar family, the great eared nightjar (Eurostopodus macrotis) of East Asia, is rather smaller at up to 150 g (0.33 lb) and 41 cm (16 in).[28] The wingspan in the great potoo and the oilbird can be more than 1 m (3.3 ft), the largest of the order.[29][30] Shorebirds (Charadriiformes) The largest species in this diverse order is the great black-backed gull (Larus marinus) of the North Atlantic, attaining a size of as much as 0.79 m (2.6 ft), a wingspan of 1.7 m (5.6 ft) and weighing up to 2.3 kg (5.1 lb).