So I've played connect-the-dots with the neck ellipses and constructed that tube. I've also added the remaining major forms - that is, the thigh masses, the legs and the feet.
Admittedly I put the legs way too close together, but these mistakes do happen, and when they do, just keep pushing forwards. You'll notice that the thighs are not visible at all in the drawing. That is, they're there, but you can't make them out and differentiate them from the rest of the torso, because of how the feathers all blend everything together.
It is entirely necessary however for us to understand what is going on underneath the skin - having eaten many a bird in my long life, I am all too well aware of their juicy, succulent thigh-meats, so how could I refrain from including them? Draw on all of your experiences, and feed your curiosity. Study and observe everything around you, as this information will prove to be very valuable in pushing the believability of your drawings in the most unexpected of ways.