A bushfire is a wildfire that spontaneously occurs in forests, scrublands, woodlands and grasslands of Australia, New Zealand and Caledonia. Bushfires are common and most severe during summer and autumn, also in drought years particularly during El Nino season. Many animals have become adept at surviving these fires. Even plants have evolved various ways to survive bushfires, such as sprouting reserve shoots after a fire or developing fire resistant seeds. Indigenous eucalyptus have seeds that explode and reproduce during bushfire.