Who ever said your Valentine had to be a human? At San Francisco’s California Academy of Sciences, biologists are celebrating Valentine’s Day with African penguins, the Associated Press reports. A video shows them receiving big red felt hearts from their caretakers and wobbling around with them in their beaks.

The California Academy of Sciences’ Vicki McCloskey told the AP that these critters are actually using the gifts to make nests for reasons that are very occasion-appropropriate. “It’s very important for you to get a mate to have a nice-looking nest,” she explained. “So, we kind of celebrate that a little bit on Valentine’s Day.” The biologists are equal-opportunity Valentine-givers, she added: “You’ll see both the males and the females taking nesting material.”

These Valentines play to the penguins’ natural nesting instincts, McCloskey added. Usually, they’ll dig holes in the sand and decorate them with plants, rocks, and sticks. But these are much more festive. One even has a special drawing of a penguin family on it.

The California Academy of Sciences has a live cam that lets you keep up with the penguins, though it doesn’t look like they’re up to much right now. But you can watch their adorable Valentine’s Day antics below. At around 1:55, you get to see a fluffy baby penguin. Happy Valentine’s Day, indeed.