 The Gaboon viper is usually found in rainforests and nearby woodlands , mainly at low altitudes , but sometimes as high as 1500 m . Spawls et al . ( 2004 ) mention a maximum altitude of 2100 m . According to <unk> and <unk> ( 1975 ) , it is generally found in environments that are parallel to those occupied by its close relative , B. <unk> , which is normally found in more open country . 
