During his 15-year-long scientific research on the fauna of Anatolia, he collected examples of mammals, birds, reptiles, frogs, fish and various invertebrates, which he brought in the museum contributing to its enrichment.

[1][2][3] The museum's artifacts were cleaned and restored after a long period of neglect by Dinçer Gülen and his team between 1987 and 1989.

[2] In the collections section, around 1,500 Insecta, 35 Pisces, 45 Amphibia, 32 Reptilia, 143 Aves (most of them coming from Yıldız Palace), 170 Mammalia and 193 Invertebrate species are on display.

[2] In addition, pictures, furs and skeletons of various mammals, birds, arthropods and other species of Turkey are displayed in the museum.

[1] Further examples and curiosities hosted in the museum are such as a lion given to President Celal Bayar (in office 1950-1960) during his official visit to Pakistan, a 9.5 kg (21 lb) weighing vulture with a wingspan of 2.70 m (8 ft 10 in), which was shot at Edirnekapı, Istanbul in 1945 and a six-legged lamb.