Roast the bird for 15 minutes at 425°F. Then lower the oven temperature to 375°F. Baste the bird occasionally. Continue cooking until a thermometer inserted into the thickest part of the thigh reads 165°F. Timing will depend on the size of your bird. If the bird is intact, estimate 25 min per pound. If the bird is spatchcocked, it could take about 35-45 minutes.