Gavest thou the goodly wings unto the peacocks? or wings and feathers unto the ostrich? Which leaveth her eggs in the earth, and warmeth them in dust, And forgetteth that the foot may crush them, or that the wild beast may break them. (Job 39:13-15 KJV)
The largest bird egg is from the Ostrich Sturthio camelus. The egg measures 15 – 20 cm long, 10 – 15 cm in diameter and weighs 1 – 1.78 kg.
Largest egg ~ Ostrich ~ measuring 17.8 by 14 cm (7 by 4.5 in)
Smallest egg laid relative to body weight ~ Ostrich egg ~ at 1.5%