The tiny cubs, currently off-exhibit, are expected to debut in Spring 2026. Mike Bock Nearly one month old, the two sloth bear cubs are shown resting in their den on Jan. 5, 2026. Zoo staff are ...

The cubs in their habitat at Smithsonian’s National Zoo and Conservation Biology Institute Dec. 7, 2025. At birth, the cubs are hairless and their eyes remain closed. Photo credit: Smithsonian’s ...