Photos of the dead animals circulated on social media and sparked a frenzy of demands that authorities take the case seriously.
Col Somcharn Pinkhanngern, chief of Ao Noi Police Station, said the arrest was made on Saturday (Mar 17) by Kui Buri National Park rangers who, while on patrol, came across two men acting suspiciously.
One of them fled into the forest but the other, identified as Somjit Boonkong, 52, a resident of tambon Ao Noi in Muang district, was detained. In his backpack the rangers found a bear head, two bear paws, meat and a gutted dead civet.
He was carrying a shotgun, ammunition, two hunting headlamps, a hammock and other items.
The rangers suspect the man who fled had the rest of the bear and possibly the carcasses of other animals.
Somjit was initially charged with illegal hunting of wildlife and having dead wildlife in his possession without permission or good cause.
Maj Gen Pattana Phetsyanawin, chief of Prachuap Khiri Khan police, said police knew the identity of the other man and would seek a court warrant for his arrest, and he would be caught.
He said wildlife poaching is a sensitive issue following the arrest of construction tycoon Premchai Karnasuta in the Thungyai Naresuan Wildlife Sanctuary last month.
Asian black bears are protected under the 1992 Wildlife Protection Act. An adult bear is 1.2 - 1.5 metres long and can weigh 150-160 kilograms.
Illegal possession of the carcass of a wild animal carries a maximum penalty of four years in prison and/or a fine of B10,000.
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