Final answer:
Tuataras are not daytime hunters; they are nocturnal and have excellent night vision which aids them in hunting. They utilize their sharp beak and strong clawed feet, rather than their rudimentary third eye, to catch prey during the night.
Step-by-step explanation:
No, tuataras are not primarily daytime hunters due to their 'sun compass' third eye. While tuataras do have a third eye, known as the parietal eye, when they are young, it becomes covered with skin and isn't used for hunting. Instead, tuataras have excellent night vision similar to many reptiles and other nocturnal animals. The Sphenodon punctatus and Sphenodon guntheri, the only two living species of the Sphenodontia order, are in fact more active at night. They have well-adapted sensory organs suited to their nocturnal lifestyle: their eyes have many light-sensing cells, and although they have no external ears, this does not affect their hunting abilities. They primarily rely on their sharp, hooked beak and strong legs with clawed feet for catching prey. Tuataras, like some birds of prey and other predators, hunt by sight, using their excellent night-time vision to detect their prey.