Dish doesn't have Discovery ID in HD. I was hoping it would be added with this latest addition of new HD channels but it wasn't. It's Discovery that's running that across the bottom of the screen--not Dish. It's available but Dish doesn't have it. Maybe soon......... I watch it all the time myself.
Discovery Wings dropped off the face of the Earth some time ago. It's the Military Channel now. But I understand what you mean. I barely watch SD now but still keep BBC A (One of the "lucky" ones to get screwed by Dish), TCM, IFC and Fox Movies are the only real exceptions.
Since many of the Discovery networks and BBC is one of them you will see it in HD on Dish soon but it most likely won't be on 61.5. They must have a good contract with them. Now only if they will get TCM in HD.