Hawaiʻi creeper is able to climb up and down trees. It uses its short, sharp beak to probe bark for insects residing underneath. If available, it will sip nectar from koa ("Acacia koa") or ōhia lehua ("Metrosideros polymorpha"). The breeding season of the Hawaii creeper lasts from April to July, during which female birds lay one to three eggs. Nests are hidden in a tree cavity or built on a high branch in either a koa ("Acacia koa") or a ōhia lehua ("Metrosideros polymorpha"). Eggs hatch after around thirteen days. The Hawaii creeper was put on the endangered species list in 1975;
Acacia melanoxylon 20%. It may also be used for producing decorative veneers. The tree's twigs and bark are used to poison fish as a way of fishing. This tree can also be used as a fire barrier plant, amongst other plants, in rural situations Plain and figured Australian blackwood is used in musical instrument making (in particular guitars, drums, Hawaiian ukuleles, violin bows and organ pipes), and in recent years has become increasingly valued as a substitute for koa wood. Acacia melanoxylon Acacia melanoxylon, commonly known as the Australian blackwood, is an "Acacia" species native in South eastern Australia. The species is