Black Marsh Turtle, Siebenrockiella Crassicollis

terrapin turtle tortoise herpetology habitat shell crassicollis chelonia plastron wildlife reptile endangered kaeng marsh freshwater siebenrockiella environment vulnerable testudines ectotherm black nature asia wilderness krachan hingeless national wild ground natural thailand outdoors cold blooded southeast rock stretch wood sacred wet forest smiling river park retract siamese chinese medicine traditional temple