Robert Irwin is driving fans wild with strange details in family photos

Robert Irwin had fans spinning on Tuesday with his latest set of family photos from Australia Zoo.

The black and white photos captured the Irwin clan – including Terri, Bindi, Chandler and baby Grace – sitting by a pool of water in the park.

Fans flocked to Instagram to praise the sweet family and point out one glaring detail: 24-year-old Bindi strategically hid her belly again.

In the images, year-old Grace played in the water while looking up at her uncle, parents and grandmother.

“My favorite days,” 19-year-old Robert wrote in the caption.

And while his fans raved about how cute the lovable bub was, many couldn’t help but notice Bindi’s strategic attitude.

Crouching low at the water’s edge, she pulled her knees together and held her arms in front of her torso as she put on a big smile on the happy occasion.

“Your sister always covers. Is there another bun in the oven?’ one fan asked.

“I’ve been seeing this for a while,” said another, while another wrote, “Maybe time for another bub to share the spotlight.” Crikey, we’d all love that!’

Others begged Bindi and her husband Chandler Powell, 26, to have more children.

‘Absolutely precious! Can’t wait for #2 baby,” one commented, while another added, “More babies!”

Fans of Bindi are currently watching the rumors that she is pregnant with her second child.

Pregnancy rumors surrounding Bindi were first sparked when she posted photos from Chandler’s 26th birthday on Nov. 14 last year.

Eagle-eyed followers pointed out that she hid her belly behind a strategically placed birthday cake.

The couple posed for photos at The Crocodile Lounge in Queensland alongside Chandler’s family from Florida as he held baby Grace.