Kids Free Month at the San Diego Zoo Safari Park will be extra special this year, after the birth of not one, but six endangered Grevy’s zebra foals—adding to San Diego Zoo Global’s ongoing effort to help preserve a population that is in steep decline.

Today, two southern white rhino calves played, chased impalas, and met giraffes and African crowned cranes as they explored the expansive African Plains habitat at the San Diego Zoo Safari Park—and at the same time, two greater one-horned rhino calves jogged and gave themselves mud baths in their Asian Savanna habitat.