The leader of Wahana Lingkungan Hidup (Walhi) - Forum of Environment - of West Kalimantan Blasius Chandra said that as a child he often heard this disturbing sound at midnight if he choose to sleep in the shelter of his parents field. Nowadays, he can still hear this sound if he visits a village near the jungle.
According to a village elder, this animal resembled a leopard with black skin and a huge body. If Kek Tung creates a sound, a various sign will be captured by and elder. Among this sign fruit in the forest will abundant, or otherwise, the harvest will fail by plague attack.
This sound could be heard from jungle areas that infrequently visited by people, but now this creature is threatened by huge forest exploitation in this land.