The collections of bird skins (approx. 20,000 specimens), mainly of
Swedish origin, but also including exotic species, were well under way
already in the 19th century.
Also our avian egg collections of mainly Swedish and European birds are important, especially the collections of clutches containing cuckoo eggs.
We also have a worldwide collection of approx. 400 bird and 200 mammalian articulated skeletons, representing almost as many species.
Recent collections represent a large gathering of small mammals, around 9,000 specimens, from Northernmost Fennoscandia, together with their ecto-parasites.
In the 19th century, extensive excavations were carried out in south Swedish bogs and carrs with the intention of extracting peat for heating purposes and to improve soil quality in agriculture. These excavations uncovered a great deal of subfossil bones and antlers from Holocene mammals. Large quantities of these bones were purchased by Sven Nilsson (1787-1883), professor and head of the museum, and successors, and are now in the custody of the museum.