"We just had to put the egg in front of one of them, and he knew just what to do," Jäger said. "He took his beak and put the egg on his feet and then put his stomach over it, which is the normal thing penguins do."
The prospect of two gay penguins adopting an egg and raising a chick has become a feel-good story in Germany in recent days. On Tuesday, penguin fans, journalists and a television crew from the country's public international broadcaster gathered to watch Ping sit on the egg.
"They were really the thing that pushed me to come to the zoo, because I really do not come to the zoo very often," said Anna Schmidt, a 33-year-old gender studies researcher from Berlin who described them as "the happy couple."
Penguins are not the most expressive birds, but Ping and Skip seemed unfazed by all the attention. They sat on a rock and looked serenely out a window, their backs to the audience, while nearby The Orange groomed her wet feathers.
"I knew homosexuality existed in the animal world, but I had never heard of gay adoption in the animal world," Schmidt said. "I am not sure why they decided to adopt, but I am sure they had their reasons."
There may be one catch, though. Anja Seiferth, the penguin keeper at Zoo Berlin, said it was not clear if the egg had been fertilised. That means it might never hatch.
She said there was no way to know for sure until early September, when the zoo will either welcome a penguin chick or not. If it does, it will be the zoo's first penguin chick since 2002.
"I hope Ping and Skip get a little penguin baby and become the best parents you've ever seen," Seiferth said. "I hope that is what happens, but so far we do not know if it will."
Like many expectant parents, Seiferth said, the pair seemed different now that they were tending an egg. Skip is normally the "tough" one, she said, while Ping is "more smooth."
"They are a little bit angrier now, a little bit protective," she said. "They do not want us to come too close to them or too close to their egg. Before they had the egg they were very cool and were more relaxed. But they have a job now."
Homosexuality has been observed in a number of species of animals, who tend to have fewer hang-ups than humans. But gay penguins seem to be unusually prominent in the world of animal homosexuality.
There have been same-sex penguin couples at many zoos, including the Central Park Zoo in New York, Sea Life Sydney Aquarium in Australia and regional zoos or aquariums in Denmark and Ireland.
And then there is the London Zoo, which in June celebrated Pride month — and its six gay Humboldt penguins — with a banner in the penguin exhibit that said "Some penguins are gay, get over it."
If there are any other gay animals at the Berlin zoo, the zookeepers said they had not made themselves publicly known.
"We don't know if there are any other gay animals in this zoo," Jäger said. "There may be."
Watching Skip and Ping on Tuesday, Schmidt said their story made her think of the lingering obstacles some same-sex parents face in Germany.
Surrogacy is banned, which means gay male couples in particular tend to rely on adoption when they want to start a family. Lesbians must navigate a complex process to be recognised as the second parent when their partners give birth.
"The state does not want the family, the nucleus of nationhood, to be autonomous or to create a new kind of family," Schmidt, the gender studies researcher, said. She turned again to Skip and Ping, who still sat with their backs to the crowd.
"But we can see that nature does not care," she laughed. "For them, there are no boundaries."
Written by: Liam Stack
© 2019 THE NEW YORK TIMES