The tuna is one of several wildlife recoveries highlighted in a major new report from WWF.
Endangered red squirrels prepare to meet for first time at Castle Howard Arboretum
Climate change is blamed for dramatic decline of chinstrap penguins living on a remote volcanic island.
Zoo bosses said the surveilling simian was intrigued "by all comings and goings".
She had been a familiar face at the zoo for 15 years, having been brought in from Germany in 2011.
The optimistic message comes after its owner reported a net deficit of £3.9m in 2025.
The RSPB says despite the project's "amazing success" it fears the birds could be illegally killed.
Scientists say the record-breaking journey by three brothers offers hope wildlife can survive growing pressures.
Three Chilean flamingo chicks have hatched in Ballaugh, with more to come...
