closeup on the head of an endangered large australian merten's water monitor lizard , varanus mertensi

chordata lacertilia monitor lizard nature reptilia sauria squamata varanidae varanus mertensi animal biology closeup herpetology large macro outdoors reptile reptilian single varaan vertebrate wild wildlife zoology detailed head mertens water watermonitor northern australia brown coldblooded australian dragon queensland predator fauna semi aquatic terrarium portrait pet