Two gay male vultures in a long-term relationship have successfully hatched an egg together.

The birds, who live at a zoo in Amsterdam called the Natura Artis Magistra, adopted the egg after it was abandoned by its former parents. After finding the egg at the on the floor of the vulture enclosure, zookeepers chose to place the unborn bird in the care of the two griffon vultures.

The vultures, who have been together for years, took turns sitting on the egg until it hatched, according to Associated Press. Now they’re further fulfilling their parental duties, feeding the hatchling by regurgitating their food into its mouth.

The zoo has said it is not unusual for its animals – especially the birds – to form same-sex couples, but that this is the first time it has played host to such a pair hatching an egg. Read more via Pinke News