[3] When the zoo staff realized that Roy and Silo were both male, they tested them further by replacing the rock with a dummy egg made of stone and plaster.

[5] Roy and Silo incubated the egg for 34 days and spent two and a half months raising the healthy young chick, a female named "Tango".

[3] Shortly after their story broke in the press, Roy and Silo began to separate after a more aggressive pair of penguins forced them out of their nest.

[3] In 2005, Silo found another partner, a female called Scrappy, which had been brought from SeaWorld Orlando in 2002,[3] while Roy paired with another male penguin named Blue.

[10] And Tango Makes Three itself became controversial, being listed as one of the top ten most challenged books in public libraries and schools across America for five years in a row,[11] but became a bestseller.

[12] Roy and Silo have also been featured as characters in theatrical works, including the play Birds of a Feather, a character-driven piece about both gay and straight relationships, which made its début in Fairfax, Virginia in July 2011.

"[3] A spokesperson for the National Gay and Lesbian Task Force responded by explaining that the actions of two penguins is not a good way of answering the question of whether sexual orientation is a choice or inborn.

[20] In 2014, zookeepers at Wingham Wildlife Park, in Kent, UK, gave an egg that had been abandoned by its mother after the father refused to help incubate it to a Humboldt penguin male same-sex pair called Jumbs and Kermit.