Z333, aka Wisdom, is a female albatross of the species Phoebastria immutabilis, whose return to the refuge of Midway Atoll in the Pacific is watched for every year by ornithologists from the US Fish and Wildlife Service (USFWS). They estimate that this animal is the oldest known wild bird.

Wisdom was first tagged at Midway in 1956 when she had just laid eggs. Given that this species doesn't reach sexual maturity until the age of 5, we can estimate that she is over 70 years old.

Again in 2023, she was observed by the USFWS, which, on December 5, announced her return on the social media network X. Wisdom is not expected to nest this year, but she has been seen in gallant company and in mating dances. "She's pretty lively for a septuagenarian!" said biologist Jon Plissner, who oversees the refuge's wildlife monitoring.

Her last chick hatched on February 1, 2021. The following season, this monogamist's long-time mate didn't join her, but one of her chicks, born in 2011, made the probable widow a grandmother again.

It is estimated that Wisdom has more than 30 direct descendants. Her exceptional longevity – the life expectancy for this species is generally about 20 years – means that she probably holds the record for the most distance traveled. According to The Washington Post, 10 years ago, scientists had already estimated that she had seen 4.8 million kilometers of ocean pass beneath her wings – 120 times the circumference of the earth.