In honor of Mother's Day, we've rounded up some of the world's most adorable animal babies caught in sweet moments -- from playful tussles and gentle naps to careful teaching -- with their moms.
But what makes these moms particularly important is that they are the only salvation to their species: All the endangered animals on this list are disappearing rapidly.
The biggest threat facing orangutans -- rapid and severe habitat loss -- isn't one that this playful baby will need to worry about (it lives at the Ragunan Zoo
in Jakarta, Indonesia).
But wild populations are fading fast -- a group in Boreno National Park decreased by 90 percent in just five years. The rapid losses provide more evidence that careful, successful, and healthy captive breeding programs are an important part of worldwide conservation efforts.
Photo by Dimas Ardian /Getty Images