A 2017 study compared the lengths of eggs produced by an array of different bird species, such as Gygis alba and Gavia stellata.

A 2017 study found that Gygis alba eggs had an average length of 4.46 cm, whereas Gavia stellata eggs were longer, with an average length of 7.22 cm.

The bird species Gygis alba, which belongs to the order Charadriiformes, and Gavia stellata, of the order Gaviiformes, were included in a 2017 study that compared the average lengths of their eggs.

Mary Caswell Stoddard led a research study that determined the average lengths of eggs, including those of Gygis alba birds (4.46 cm) and Gavia stellata birds (7.22 cm).