if there's a white-cheeked barbet Psilopogon viridis in your neighborhood you will definitely hear it even if you don't see it. their green backs and brown and white heads afford excellent camouflage as they sit upright and still in the trees. but their call is loud and clear starting with a trrrrrrrrrr and continuing koo-too koo-too koo-too for a remarkably long time. the call may vary a little and sound more like
koop-taa koop-taa or as we jokingly say, even like our doctor's name gupta gupta gupta. during courtship the calls are louder and interminable but later in the year the intensity lessens considerably, presumably because they are busy catching insects for the newly hatched chicks.