Perilaku Asuh Induk dan Kesejahteraan Gajah sumatra (Elephas maximus sumatranus Temminck, 1847) di Kebun Binatang Gembira Loka, Yogyakarta = Maternal Care and Welfare of sumatran Elephants (Elephas maximus sumatranus Temminck, 1847) in Gembira Loka Zoo, Yogyakarta

Perilaku Reproduksi Tahap Pre-Copulatory pada Gajah Sumatra (Elephas maximus sumatranus, Temminck 1847) Jantan Adolescence di Taman Margasatwa Ragunan = Pre-Copulatory Reproductive Behaviour of Adolescence Male Sumatran Elephant (Elephas maximus sumatranus, Temminck 1847) at Taman Margasatwa Ragunan

Pola Perilaku Pengasuhan Orangutan Kalimantan (Pongo pygmaeus Linnaeus, 1760) di Kebun Binatang Gembira Loka, Yogyakarta = Parenting Behavior Patterns of Bornean Orangutans (Pongo pygmaeus Linnaeus, 1760) at Gembira Loka Zoo, Yogyakarta

Perilaku Harian Dan Interaksi Betina Terhadap Jantan Owa Kelawat (Hylobates Muelleri Martin, 1941) Pada Kandang Terpisah Di Kebun Binatang Gembira Loka, Yogyakarta = Daily Behavior And Interactions Of Female Towards Male Kelawat Gibbons (Hylobates Muelleri Martin, 1941) In Separate Cages At Gembira Loka Zoo, Yogyakarta

Studi Interaksi Antarberuang Madu (Helarctos malayanus) di Kandang Peraga Kebun Binatang Gembira Loka, Yogyakarta = The Study of Sun Bear Interaction (Helarctos malayanus) in an Enclosure at Gembira Loka Zoo, Yogyakarta