Bindi Irwin gives pregnancy update and shares baby's sonogram

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Bindi Irwin has shared her sonogram in an update about her unborn child, who she says is now "the size of a hummingbird".

The 22-year-old conservationist - who is the daughter of the late Crocodile Hunter, Steve Irwin - is expecting her first child with her husband Chandler Powell and took to Instagram over the weekend to give an update on her pregnancy.

Bindi also gushed that they "can't wait" to start teaching their little "Baby Wildlife Warrior" about the importance of protecting the planet and "the beauty of wildlife".

Alongside a snap of the pair holding the baby scan and a koala, Bindi wrote: "The animal joeys we care for are excited to meet our human joey. Baby Wildlife Warrior is about about the size of a hummingbird now! We can't wait to teach our little one about the importance of protecting our planet and the beauty of the wildlife and wild places we love so much. Thank you for your kindness and support on this magical journey. (sic)"