Most famously, of course, is the new panda Bao Bao. A video released by the zoo showing her climbing a tree recently made the news. Not her being born. Literally the first time she climbed into a tree. Reporters who no doubt went to school for this sort of thing covered that as a story. If you look at the write-up you'll notice that the outlet actually had two different journalists to the scene. That's how this town feels about that particular cub.
In other actual, reported news - and this one made it all the way to the Washington Post - the zoo's four baby lions passed their first swim test this week. They're getting big enough to go on exhibit, and the lion enclosure has a moat. So zookeepers needed to make sure the cubs wouldn't drown if they got pushed into that moat. One zookeeper got to wade into the water with the baby lions to keep them in the shallow area, because her job are better than yours.
Then there's a new baby sloth bear, who was also recently accompanied by her keepers for a trip into her exhibit. DCist wrote it up under the headline "This Sloth Bear Cub Went Outside So You Could Have Something Cute To Look At." Quite so.