Summary of the proportion of specimen lots from Hamilton’s collection, belonging to each avian order, from the previously catalogued material (orange bars), the previously uncatalogued material (purple bars), and total (dark grey bars). The “Others” group brings together data from the following orders: Accipitriformes, Apodiformes, Falconiformes, Pelecaniformes, and Podicipediformes. Refer to Suppl. material 1: table S3 for the exact numbers in each category.