Two male Humboldt penguins were given an egg after another couple threw it out of their nest. And the happy couple are raising the chick as their own.
They incubated it until it hatched, and the zoo said in a statement that the pair have been taking care of the chick just like a heterosexual penguin couple.
The zoo's three pairs of gay penguins first made news back in 2005 when they were observed in mating rituals and trying to incubate rocks.
There is another pair of gay penguins at Central Park Zoo in Manhattan. They also raised a chick together in 2004.