Bucks come and go. Some stay in one somewhat small home range, some have big home ranges, some seasonally change their home range. Biggest shift I see around here in mature bucks home range is middle to end of November. Habitat and food change as vegetation changes, hunting pressure (both direct and general seasonal), breeding season pressures and just learned behaviors can effect movement. Probably other influences we dont know about. And every buck is an individual too. Run cameras year around over a big enough area and network with neighbors over several years and you learn a lot. I think the so called "nocturnal" bucks really has to do more with being too far from their day time Habitat and them not getting to ur stand or camera until dark than them not moving at all during daylight. Big bucks learn where safe areas are and where danger is during daylight. Sometimes by direct experience from hunting pressures and just previously learn seasonal experiences.