Burns are done on a ‘time since fire’ basis, which means that areas such as Wandoo forest are burnt regularly despite there being little to no undergrowth or leaf litter when they are burnt, as the photo below shows. The area in the photo was burnt 10 years prior to the photo and was burnt again the following year
In the 2020-2021 burning program, almost 500 sq km of this type of open woodland was burnt, despite there being little to no ‘fuel’ across the vast majority of the area. The burns had severe impacts on Carnaby’s nesting sites and many other threatened species.
The video below is over Banksia Woodland north of Perth, which hasn't been burnt for over 20 years. The vast majority of the area is very low vegetation (~knee high) and over 30% exposed soil. The burnt area shown in the video is only 1 sq km of 360 sq km burnt in a single year.