This great photo, taken by keeper Nick at the popular attraction, shows the zoo's six Asian elephants out in the sun as a group.
They are one of just four breeding herds of the species in the UK but staff have been careful not to integrate them too soon.
For years, 50-year-old Kate - the first animal to arrive at the zoo in 1972 - was the sole Asian elephant, living in an old aerodrome hangar.
She has been kept separate from the more recent arrivals - until now.
The Spanish-owned zoo invested around £5m in new state-of-the-art living quarters that opened to the public in March 2018.
Gradually, the rest of the herd was moved from Twycross in Leicestershire and now has five females: Kate and her companions Tara, Minbu, Noorjahan, and Esha, who is the youngest.
Posting on social media, a zoo spokesman said: "The team at Project Elephant have been continuing their work to integrate the herd and if you've been following their story for a while, you'll know that this is a very special photograph indeed.
"This isn't just any photograph. This is all 6 of our elephants enjoying a sunny afternoon on the grass paddock. Together."
In response, Kerrie Tanner Heath said it was "lovely to see them all together".
And Nicola Jane Gething posted: "Brilliant photo, the team have worked so hard. So happy for Kate to be part of a herd after all the years of being alone."