Preheat the oven to 200 degrees Celsius (392 degrees Fahrenheit).
Rub the mallards with olive oil, season with salt and pepper, and brown them in the oven for 10 minutes.
Turn off the oven and let the ducks "rest" in the oven's residual heat for 5 minutes.
Take the ducks out and let them rest for 10 minutes before carving.
Cut the breasts and thighs from the carcass.
Remove the skin from the breasts and discard.
Place the breasts and thighs in a greased ovenproof pan.
Slice the orange with the peel and lay the slices over each breast, then sprinkle with thyme, rosemary, sage, and salt and pepper.