On Saturday 6 July, the annual London Pride parade is due to take place, passing from Portland Place to Trafalgar Square.
On Friday 5 July, London Zoo is hosting a Zoo Night to mark the occasion, during which visitors can learn about same-sex couples across the animal kingdom, including among penguins.
One of the zoo's most well-known same-sex penguin couples is Ronnie and Reggie, who have been together since 2014.
In commemoration of their relationship and those of other same-sex penguin couples, a new banner has been placed in the zoo's Penguin Beach, which reads: "Some penguins are gay. Get over it."
In 2015, Ronnie and Reggie adopted an egg that had been abandoned by another penguin couple.
They live at London Zoo alongside fellow same-sex couples Nadja and Zimmer, and Dev and Martin.
Last year, a penguin called Rainbow was hatched during Pride weekend, and named after the rainbow-coloured Pride flag.
The couple, Sphen and Magic, bonded ahead of the 2018 breeding season.
In the early 20th century, British Antarctic explorer George Murray Levick documented the sexual activity of Adelie penguins, noting that penguins engaged in homosexual activity.
In addition to the Pride-themed Zoo Night, London Zoo is also celebrating Pride weekend by hosting a show on Sunday 7 July called "Rainbow Families".
The ZSL's LGBT+ society, Team Pride, will also be taking part in the London Pride parade.
Join The Independent on Thursday 4 July for a panel discussion and Q&A, where we ask: what is the role of Pride in 2019?
Speakers include Asifa Lahore, Britain’s First Out Muslim Drag Queen and trans activist, and human rights campaigner, Peter Tatchell.
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