In short: Internal documents from the Department of Biodiversity Conservation and Attractions show more than 100 trees were felled in a prescribed burn on WA's south coast last year.

The fire burned 99 per cent of the prescribed area and damaged close to 100 rare red tingle trees that do not grow anywhere else on the planet.

What's next? The Leeuwin group, a consortium of WA's top environmental scientists, has urged the government to amend its burn program to avoid another mass felling.