What's black and white, adorable and at Philadelphia Zoo?

PHILADELPHIA (WPVI) -- The Philadelphia Zoo is showing off some of its newest additions - four baby lemurs.

Four black-and-white ruffed lemur babies were born last month.

And get this - all four combined weighed less than a pound.

They're not quite ready for a public debut, but we get to see the primate siblings on video.

In fact, they're still too little to even get around on their own so mom "Kiaka" has to carry them, picking them up by her mouth.

Black-and-white ruffed lemurs are critically endangered in Madagascar so zookeepers say it's important for the species to breed in captivity.

A public debut is planned in the coming weeks.