San Diegans Ernest and Evelyn Rady have made a record-setting commitment in support of the San Diego Zoo’s Animal Ambassador program. The Radys have pledged $20 million, of which $15 million will be a challenge grant that must be earned with matching donations from other Zoo supporters.

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.