Scientists seek rare species survivors amid Australia flames

Australia’s unprecedented wildfires season has so far charred 40,000 square miles (104,000 square kilometers) of brushland, rainforests, and national parks — killing by one estimate more than a billion wild animals. Scientists fear some of the island continent’s unique and colorful species may not recover. For others, they are trying to throw lifelines.

Where flames have subsided, biologists are starting to look for survivors, hoping they may find enough left of some rare and endangered species to rebuild populations. It’s a grim task for a nation that prides itself on its diverse wildlife, including creatures found nowhere else on the planet such as koalas, kangaroos and wallabies.

“I don’t think we’ve seen a single event in Australia that has destroyed so much habita t and pushed so many creatures to the very brink of extinction,” said Kingsley Dixon, an ecologist at Curtin University in Perth.

Not long after wildfires passed through Oxley Wild Rivers National Park in New South Wales, ecologist Guy Ballard set out looking for brush-tailed rock wallabies.

The small marsupials resemble miniature kangaroos with long floppy tails and often bound between large boulders, their preferred hiding spots.

Before this fire season, scientists estimated there were as few as 15,000 left in the wild. Now recent fires in a region already stricken by drought have burned through some of their last habitat, and the species is in jeopardy of disappearing, Ballard said.

In prior years, his team identified a handful of colonies within the national park. After the recent fires, they found smoking tree stumps and dead animals.

“It was just devastating,” said Ballard from the University of New England in Armidale. “You could smell dead animals in the rocks.”

But some...