Birkhead et al. 2020: New insights from old eggs – the shape and thickness of Great Auk Pinguinus impennis eggs

Here, we make available the raw dataset (including shape indices and egg size measurements) used to statistically analyse and compare egg shape of the extinct Great Auk and its closely related sister species: Common Guillemot, Brünnich's Guillemot and Razorbill.The dataset was used in Birkhead et al.'s (2020) Ibis manuscript intitled: New insights from old eggs – the shape and thickness of Great Auk Pinguinus impennis eggs (https://doi.org/10.1111/ibi.12820).