Telah dilakukan penelitian mengenai perilaku asuh induk kanguru pohon kelabu (Dendrolagus inustus) dan perilaku harian anak tanpa keberadaan induk betina, dengan tujuan untuk mengamati perilaku asuh induk betina semasa hidupnya, pengaruh keberadaan jantan pada pengasuhan, dan perilaku harian anak tanpa keberadaan induk betina. Subjek penelitian terdiri dari induk betina dan anak, dengan individu terlibat, induk jantan dan betina dewasa. Penelitian dilakukan dari Oktober 2024 hingga Januari 2025. Pengamatan dilakukan berdasarkan kondisi sosial, yaitu pengasuhan maternal, pengasuhan maternal dengan keberadaan induk jantan, dan perilaku harian anak tanpa induk betina. Pengambilan data menggunakan metode focal animal sampling dengan interval 5 menit tanpa jeda, didukung oleh metode ad libitum. Hasil penelitian menunjukkan bahwa perilaku asuh yang teramati saat ada dan tanpa induk jantan adalah membawa anak dalam kantung, menyusui, menjaga anak, penyediaan makanan, lokomosi, dan grooming, serta perilaku agonistik. Perilaku harian anak tanpa induk betina didominasi oleh istirahat, diikuti makan, grooming, dan lokomosi di kandang dalam secara arboreal, serta terjadi interaksi terhadap betina dewasa melalui pendekatan dan penghindaran. Kesimpulannya adalah perilaku asuh induk betina yang teramati sesuai perilaku pengasuhan alami marsupial, keberadaan induk jantan memengaruhi durasi perilaku asuh, dan perilaku harian anak tanpa induk betina serupa perilaku harian alami kanguru pohon di penangkaran.

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A study about parental care of Grizzled tree-kangaroo Dendrolagus inustus) and juvenile day-time behavior without maternal presence has been conducted, which aimed to observe maternal behavior during the mother's lifetime, male presence influence on maternal behavior, and day-time behavior of juvenile after the mother’s death. The study subjects consisted of the mother and juvenile, along with involved individuals, male parent and adult female. The research was conducted from October 2024 to January 2025. Observations were done based on social conditions: maternal care, maternal care with male presence, and juvenile’s day-time behavior. Behavioral data were collected using the focal animal sampling method at five minute intervals without interlude, supported by ad libitum method. Maternal behavior observed in both conditions included carrying young in pouch, nursing, guarding, food provisioning, locomotion, grooming, and agonistic behaviors. Day-time behavior of the juvenile was dominated by resting, followed by feeding, grooming, and locomotion in the enclosure arboreally, along with social interactions with the adult female by approach and avoidance from the juvenile. The study concludes that maternal behaviors aligned with natural marsupial behavior, maternal care were influenced by male presence, and juvenile’s day-time behavior without the mother remained consistent with typical captive tree-kangaroo behavior.