The world’s endangered okapi population has increased by one this month, after okapi mom Subira gave birth to her first calf at the San Diego Zoo.

Two lactating African elephants—Umngani (pronounced OOM-gah-nee), who gave birth to a healthy female calf, Mkhaya or “Kaia”, on Sept. 26, 2018; and Ndlulamitsi, known as Ndlula, who gave birth to a healthy male calf, Umzuli-Zuli or “Zuli,” on Aug. 12, 2018—are participating in a nutritional study, allowing researchers to study the content of their milk.

A new study is shedding light on the importance of one critical resource for Andean bears living in the dry mountain forests of Peru: water.