The museum has 8 research departments: invertebrate (from sponges to insects), entomology (insects), ichthyology (fish), herpetology (amphibians and reptiles), ornithology (birds), mammalogy (mammalian), the sightseeing division and the Republican Bird Ringing Center.
There are three scientific-bioanalytical laboratories, biological preparations workshops and an experimental taxidermy laboratory.

There are more then 250 000 exponents in the Museum’s collection: invertebrates, insects, fishes, amphibian and reptile, birds, mammalian. Different forms of displays are prepared for collections – stuffed animals and birds, skeletons, moist preparations, fells, skin, anatomical preparations etc.
Exhibits from expeditions, trips, and private persons’ presents constantly supplement exposition. Taxidermists of the museum make exhibits. Unique sized giraffes, hippopotami, aurochses, orang-outangs, camel have also been hand-made by taxidermists of the museum.

Animals are stuffed in many different ways depending on the species and its purpose. The majority of the taxidermic animals in the museum’s collections have been found dead in nature or died in a zoo. All large mammals and birds waiting for preparation for the exhibitions are examined immediately upon their arrival to the museum. Their bodies are carefully measured. The animals are then skinned. The skin is worked out and the bones are cleaned. After this begins the long working process of restoring the animal’s natural form or movement.

Department of Mollusca (+370 37 203830):

Department of Insects (+370 37 200298):

Department of Fishes and of Reptiles (+370 37 203830):

Department of Birds (+370 37 200305):

Department of Mammalia (+370 37 200305):

Center of Ringing Birds (+370 37 20 58 70):

Department of Excursions (+370 37 222543):

Department of Art (+370 37 320283):