The tarsus (same as tarsometatarsus) is the foot bone, but many people call it the bird's "leg," since it is the most visible part of the bird leg. As you can see though, birds walk on their toes rather than their feet, just like cats and dogs. The femur and often the fibula & tibiotarsus disappear within all those feathers. So if you ever say someone has "chicken legs" you're probably comparing the person's legs to a bird's skinny feet. But if you ever eat a chicken leg, you're most likely eating the meaty area that makes up the thigh of the bird.
That's all for now for the anatomy lesson, I'll be back later so I can post some pictures from my most recent excursion to a Raptor Banding Class.