sailfin dragons or sailfin or crested lizards hydrosaurus lying on the branch, resembling fabulous green dragon

agamid agamidae animal branch calm climber creature crest crested cylindrical dinosaur diurnal dragon ecology environment exotic eye forest green hydrosaurinae hydrosaurus lizard log natural nature omnivore omnivorous pineal protect relax reptile resting sail sailfin saillike semiaquatic semiarboreal skin spikes tail texture tree tropical vestigial wild wildlife wood