In what has become a yearly Valentine's tradition at the California Academy of Sciences, the museum's African penguins received heart-shaped love notes from visitors yesterday afternoon. The notes, written on red heart-shaped cards, become materials for each bird-couple's lovenest when the little guys carry them back to their mates.

NBC Bay Area has even more photos of the little guys waddling around all lovey-dovey. If you're feeling lonely this Valentine's Day, you can always tune in and share in the bird love on the Cal Academy's streaming penguincam below:



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Hat tip: RichmondSF