The ornithological collection consists of dermoplastic preparations of various species. Most of the preparations have the date and the place where they were collected and in most cases the name of the person who found and prepared them. Specimens which lack this information are of older date and can be used as exhibit specimens for thematic exhibitions. The oldest bird preparations are from the beginning of the XXth century (1904-1909) and they came to the museum as gifts, the most numerous being those bestowed by count Borelli. Since nowadays almost all bird species in Croatia are protected by law so that to disturb or kill them is prohibited. New dermoplastic preparations are made only from birds that have suffered some mishap. Thusly this collection is significant because it is more and more difficult to replenish the ornithological collections of birds with new prepared specimens.