In the images, Bindi and her American-born husband smile as they embrace and pose with their daughter, Grace Warrior, five, against a spectacular mountain backdrop. Several cows can also be seen in the distance.
Alongside the family photographs, Bindi told Chandler just how much he and their daughter mean to her.
'Happy 30th birthday, my love. Grace and I both agree; you're our world. And our home. We love you beyond description,' she wrote.
Chandler responded warmly in the comments, writing: 'I love you so much. You girls make every decade wonderful.'
Bindi Irwin shared a loving birthday tribute to her husband, Chandler Powell, as he turned 30
The 28-year-old conservationist posted a gallery of photographs showing herself and her American-born husband posing happily at a wildlife park
However, Bindi's birthday tribute also included a playful dig at her husband as he left his twenties behind.
In a photograph taken at home, Chandler proudly holds a card with the cheeky message: 'Today we mourn the loss of a man to his 30s. He is survived by his younger, hotter wife.'
The teasing message appeared to amuse Chandler, while Bindi took the opportunity to point out that she remains the younger half of the couple.
'Bring on the 30s club. This card perfectly sums it up. Thank goodness for my wife,' Chandler wrote.
Bindi and Chandler married in a private ceremony at Australia Zoo in March 2020 and welcomed Grace the following year.
The couple first met in 2013, when Chandler visited Australia Zoo while taking part in a wakeboarding competition.
They maintained a long-distance relationship for several years before becoming engaged in July 2019. Their intimate Australia Zoo wedding took place in March 2020, during the early stages of the COVID-19 pandemic.
Grace was born in March 2021, and her parents regularly share snapshots of their family life and conservation efforts on social media.
The couple smiled as they embraced and posed with five-year-old Grace Warrior in front of a stunning mountain landscape, with cows visible behind them
In a photograph taken at home, Chandler proudly displayed a card featuring a brutally funny birthday message
Bindi, Chandler and their daughter live at the Australia Zoo sanctuary, where both adults play an active role in running the facility.
Bindi and her younger brother, Robert, 22, have continued working to preserve the legacy of their father, Steve Irwin, since his tragic death in September 2006.
The renowned conservationist died after being struck in the chest by a stingray while filming underwater at Batt Reef, off Queensland's coast.
