One freshly laid egg that broke
(see below) measured 62 × 42.3 mm. In addition
to two eggs measured in 19603
(58 × 41.5 and 60
× 44 mm) and one removed from the oviduct of a
collected female in 1897 (61 × 43 mm)13,27, this gives
a mean egg size of 60.3 × 42.7 mm, similar to that
of Dolphin Gull35.