The "Irish Room", the ground floor of the museum, displays Irish animals, notably several mounted skeletons of giant Irish deer. Numerous skulls of those and other deer line the walls. Stuffed and mounted mammals, birds, fish — and insects and other animals native to or found in Ireland — comprise the rest of the ground floor. Many of the specimens of currently extant animals, such as badgers, hares, and foxes, are over a century old. A basking shark hangs from this ceiling. This grouping of Irish fauna in one room dates from 1910, when the collections were arranged by geography rather than purely taxonomy.