Other celebrities have also donated to help battle the fires, including Chris Hemsworth, Nina Dobrev and Leonardo DiCaprio.
Earlier this month, Bindi Irwin said "our Wildlife Hospital is busier than ever … having officially treated over 90,000 patients".
"With so many devastating fires within Australia, my heart breaks for the people and wildlife who have lost so much," she posted on Instagram.
She also shared a heartfelt post of her late father, Steve Irwin, reflecting on how he'd feel about the wildlife devastation in the wake of so many blazes.
The Australia Zoo Wildlife Warriors, which was founded by Steve and Terri Irwin in 2002, weren't the only ones to tweet their thanks.
Terri Irwin shared her heartfelt appreciation from her own personal account as well.
"Seth's generosity gives me hope for the future of koalas," she said, referring to a species now officially in crisis.
The Australian Koala Foundation (AKF) estimates there are less than 100,000 koalas left in the wild, possibly as few as 43,000, all residing in the east of the country.
If there really are lower than 50,000 koalas left, the species would be "functionally extinct". That is debatable, as some populations are doing better than others. But there is no doubt the koala is in danger.
And they aren't the only ones struggling.
"The fires will have killed millions of animals … mammals, birds, reptiles," Wildlife Victoria boss Megan Davidson said.
University of Sydney ecologist Chris Dickman predicted that bushfires are likely to have killed almost 500 million animals since September, but concedes the true toll was likely to be far higher.
For those who encounter displaced wildlife or are living close to once densely populated habitats, there are a few ways to help thirsty animals:
• Distribute containers of water outdoors, being sure to throw in some sticks and leaves so that insects have something to cling to
• Swimming pool owners should add "climb-out points" so animals don't drown
• Fruit tree owners should remove netting to share their produce
• When offering pellets and hay, be sure to spread the food out so that species have a lesser chance of being targeted by predators.
