Eagle
WKR
This is not true. They may gobble on the roost, but birds are often silent on the ground for a number of reasons (non dominant/henned up, etc.)Turkeys always gobble at least once. It may be very soft compared to a young bird lighting up a tall pine on a hilltop, but they always gobble. If you're not hearing a gobble either you got no bird or you were too far away.
Aside from deer hunting/spot and stalking, you don’t have many options. If you can hear drumming well, still hunting can work as even silent birds will often drum. Pinpointing the location of the drumming bird can be difficult in the mountains, but pretty easy in most other terrain. Some birds you can hear drum from 100+ yards, others have to be within 30ish. So if you can hear one drumming, you are probably in his bubble and very light calling might bring him in quick!