The smallest egg laid by any bird is that of the vervain hummingbird (Mellisuga minima) of Jamaica and two nearby islets. Two specimens measuring less than 10 mm (0.39 in) in length weighed 0.365 g (0.0128 oz) and 0.375 g (0.0132 oz).
An egg laid on 5 Oct 1998 by a 'posture canary' of the German Crested variety owned by M.J. de Rijck of Heijen, The Netherlands, measured 7 mm (0.275 in) in length, 5.25 mm (0.2 in) in diameter and weighed 0.027 g (0.0009 oz).
Eggs emitted from the oviduct before maturity, known as 'sports', are not considered to be of significance.
Comments below may relate to previous holders of this record.