Tingle trees are now found only in the Walpole-Nornalup area, which has the wettest and least seasonal climate in the south-west. The red tingle (Eucalyptus jacksonii) is by far the broadest of any tree in WA, with a circumference of up to 20 metres. The yellow tingle (Eucalyptus guilfoylei) and Rate's tingle (Eucalyptus brevistylis) are smaller. Karri (Eucalyptus diversicolor) grows only in high rainfall areas of south-western Australia. It grows up to 90 metres high, flowering from May to December. Karri oak (Allocasuarina decussata) grows to 15 metres. This tree has distinctive corky bark with pine-like needles and small spiky seed pods, a favoured food for native parrot species. Fossils of closely related species have been found dating back to the time of Gondwana. Tassel bush (Leucopogon verticillatus) is an erect, bamboo-like shrub, 0.8-4 metres high with large, 10-2.5cm leaves in whorls. It produces pink tassel-like flowers from August to November. Native wisteria (Hardenbergia comptoniana) is a twining shrub or climber. It has leaves divided into three leaflets, long pointed seed pods and purple or white flowers from July to October. The white-naped honeyeater, 13-15 cm long, is olive green above and white below. It has a black head, nape and throat, a red patch over the eye and a white crescent-shaped patch on the nape. Its diet is principally nectar from a variety of flowers, supplemented by insects and various other invertebrates. Red-winged fairy wrens are sedentary and endemic to the south-western corner of Western Australia. They are primarily insectiferous, and forage and shelter in scrubby vegetation in temperate wetter forests dominated by karri.