Cal Academy penguins get early Valentine's Day treat

African penguins at the Cal Academy of Sciences in SF's Golden Gate Park got an early Valentine's Day treat Thursday morning.
February 13, 2014 1:10:50 PM PST
Some love birds enjoyed an early Valentine's Day treat in San Francisco Thursday morning.

A biologist passed out heart-shaped valentines to the African penguins at the California Academy of Sciences in Golden Gate Park.

Visitors wrote messages of love on the valentines.

The penguins usually take the valentines back to their nests and that often encourages couples to breed.

Those valentines will eventually get used as nesting material.