penan bulbul alophoixus ruficrissus brown songbird with white throat and small crest in pycnonotidae found borneo in mid-storey of

white throat south songbird ruficrissus pycnonotidae primeval perched penan park ornithologist nature native national mountains mountain montane malaysia island hills green forest flower feather fauna endemic crest colorful bush bulbul brown branch borneo birdwatching birds birding bird bill beautiful beak background asia animal alophoixus small found mid-storey broad-leaved evergreen rainforests 1500 metres