known in New York, as a pairing of two penguins named Wendell and Cass at New York Aquarium was reported in 2002. However, attention was first brought to Roy and Silo after The New York Times published a story about them in May 2004. The article described them as "gay penguins", and listed two other pairs of penguins in New York that showed similar behavior. Roy and Silo's story became the basis for two children's books, And Tango Makes Three, by Justin Richardson and Peter Parnell and illustrated by Henry Cole, and the German-language Zwei Papas für Tango (Two Daddies for Tango) by Edith Schrieber-Wicke and Carola Holland. And Tango Makes Three itself became controversial, being listed as one of the top ten most banned books in public libraries and schools across America for five years in a row, but became a bestseller. 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. And Then Came Tango, a play/ballet for young audiences by Emily Freeman, was premiered during the March 2011 Cohen New Works Festival at The University of Texas at Austin. The Austin Chronicle recognized the production with an Honorable Mention in its "Top 10 Theatrical Wonders of 2011." Certain groups jumped on the breakup of the pair as a victory for their ideals. Warren Throckmorton said through Christian right organization Focus on the Family that "For those who have pointed to Roy and Silo as models for us all, these developments must be disappointing. Some gay activists might actually be angry." 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 a birthright. A 2010 study by France's Centre for Functional and Evolutionary Ecology found that homosexual pairings in penguins is widespread, but such pairings do not usually last more than a few years. The publicity on the subject caused public outcry among gay and lesbian communities when stories were published about zoo keepers forcibly splitting up same-sex penguin couples. Dwindling numbers of some species of penguins contributed to those decisions. The act of allowing a same-sex pair of penguins to adopt either an