Zookeepers round up a group of two-day-old capybara babies for their first medical checkup.

Scientists have found that the fertility rate of captive rhinos is being compromised. What they're doing to fix it.

These birds have one of the most complex social structures in the world.

Zookeepers at the San Diego Zoo weigh and measure new giraffe calf Obi.

Critically-endangered Sumatran tiger cubs enjoy playtime on a swing at a conservation zoo.Source: London zoo

Meet another long-necked plant-eater from the African plain, whose name means "giraffe gazelle" in the Somali language.

Both male and female Bighorn sheep have horns, but only the males' continue to grow as they get older.

Learn all about the early behaviors of elephant calves at the San Diego Zoo.

Join Nate Jaros, curator of fish and invertebrates at Aquarium of the Pacific, to learn what it takes to care for these aquatic oddities.

San Diego Zoo's Olivia Degn explains how animals are exposed to constant enrichment through inter-species interaction, which can be very interesting to observe.

It's time for some "holiday" enrichment at the San Diego Zoo.

It's easy to see where their sunny title comes from.

This little guy was born at about half the weight of a typical cub. Doctors soon realized his diagnosis of hyperthyroidism would mean lots of extra care and special treatment for his development.

Although he may look like a cross between a rabbit and a deer, he's actually a rodent. Watch as Zoo Educator Hannah demonstrates what positive reinforcement is, and why it's an important technique in providing excellent care for animals...

Here's how to read "between the lines" and tell the three species of zebras apart.

The giant otter found a friendly female companion to help him explore his new environment after being transferred from a rehabilitation center.

These birds are in nectar heaven at San Diego Zoo's Lorikeet Landing.

Ebony has been a resident of Utah's Hogle Zoo for 35 years.

The good thing about young cats is they can bounce right back despite some awkward landings.

This brother-sister pair couldn't be any more different.

Learn all about these incredible lizards.

A major threat to these frogs is a fungus that's sweeping through Central and South America.

An older female kangaroo was starting to move slower than others in her mob, so keepers did a scan and discovered she had injured her spine.

You can also see the ants' underground nest at the Children's Zoo at San Diego Zoo, something you wouldn't be able to see in the wild.