Bindi Irwin shared photos of her family releasing sea turtles into the ocean in honor of her mother Terri's birthday

• Bindi Irwin released five sea turtles into the wild in honor of her mother Terri's birthday.
• She was joined by husband Chandler Powell, brother Robert, and baby daughter Grace Warrior.
• Bindi announced she would be taking a month away from social media in June.

Bindi Irwin, wildlife conservationist and daughter of late television personality Steve Irwin, shared photos of her family releasing sea turtles into the wild in honor of her mother Terri's birthday.

The family excursion to free the group of five turtles, previously cared for at Australia Zoo Wildlife Hospital, included Bindi's husband Chandler Powell, her brother Robert, and her daughter Grace Warrior, who is almost 4 months old.

The Australian native, 22, captioned the pictures with a sweet message for her mother Terri, who turned 57 on Tuesday. "This day will live in my heart forever," she wrote, "I love you beyond description, Mum."

In the birthday wishes posted on Tuesday, Bindi also revealed that Terri has taken on the nickname "bunny" now that she's grandmother to baby Grace Warrior, who was born on March 25.

The photo series comes five days after Bindi returned to social media after taking a month-long hiatus to spend time with her daughter and focus on her mental health.

Returning to Instagram last Thursday, she shared a collection of favorite moments with her daughter during her social media break which included "nature walks" and "looking for wildlife."

Bindi, who has over 4.7 million followers on Instagram and nearly 800,000 followers on Twitter, told followers a month ago that she would be "taking a break from social media" and her work in the public eye.

"I feel tremendously grateful to share our life and conservation work with you but I need some time to focus on the happiness that is my family (both human and animal)," she wrote at the time.

In the same post, she thanked the people reaching out to her sharing their mental health journeys.

"Thank you for sharing and speaking your truth. To my friends who are dealing with depression, anxiety and other battles every day - I see you. These issues are very real and deserve to be discussed and addressed," she added.