Burning heart of a living old growth Forest Red Gum tree, Eucalyptus tereticornis, Australia. Burning heart of a living old growth Forest Red Gum tree (Eucalyptus tereticornis) - during routine fire management of Australian bushland, can create wildlife habitat if tree survives and is left standing, but can be natural heritage and habitat lost if destroyed - part of the variable fire regime which needs care to avoid reducing biodiversity and natural heritage, but can promote biodiversity if managed well.