The largest extant species of bird measured by mass is the common ostrich, closely followed by the Somali ostrich. A male ostrich can reach a height of 2.8 metres and weigh over 156.8 kg (346 lb), A mass of 200 kg (440 lb) has been cited for the ostrich but no wild ostriches of this weight have been verified. Ostrich eggs are the largest of any living bird, averaging 1.4 kg (3.1 lb).