In Olsztyn’s Zoological Museum there are over 2500 exhibits from Poland and the farthest reaches of the world. The collection is constantly enriched with new exhibits thanks to field researches, exchanges lead with other scientific facilities and private donations.

The most interesting exhibits are, among others, an albino mole and a Great Bustard, which is currently almost extinct in Poland. Moreover, in the museum one can see stuffed animals which are totally extinct in Poland, or which are extremely rare. Collections of fish and insects are especially numerous. Over 700 items of the latter are butterflies that live in Poland.

Until 1977 prof. Janina Wengris took care of the museum. From 1950, she was also responsible for the organisation of the Department of Zoology in the then High Agricultural School (Wyższa Szkoła Rolnicza). In 1985 the museum was given the name of prof. Janina Wengris.

The museum belongs to the Department of Zoology and is situated in the building of the Biology and biotechnology Faculty of the University of Warmia and Mazury. The items are exhibited in the classrooms, the corridors and the hall.