Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Brown Treecreeper (Climacteris picumnus) is the largest Australasian treecreeper. The bird is endemic to eastern Australia, found in eucalypt forests and woodlands of the Great Dividing Range. The Brown Treecreeper is pale brown to grey-brown, with black streaking on the underparts and black bars on the undertail. The sexes are largely similar. It is an active and noisy bird.