What two factors are stated to provide the most reliable method for separating the Hooded Oriole from the Orchard Oriole in the field?
Answer
Color saturation and geographic location
Mastering the male's color saturation (true black vs. purplish-chestnut) and the bird's geographic location provides the most reliable method for identification.

Related Questions
What pigment defines the Hooded Oriole male's hood, contrasting with the Orchard Oriole male's dark areas?How is the deep coloration on the male Orchard Oriole often described when compared to true jet black?Which geographical region is the Hooded Oriole primarily associated with?What is the typical habitat preference for the breeding Orchard Oriole?Besides the dark hood and back, what feature provides a strong contrast on the male Orchard Oriole?According to the summary chart, what color is the back of the male Hooded Oriole?How is the song quality typically described for the Orchard Oriole?What characteristic makes separating female Hooded and Orchard Orioles significantly difficult?What two factors are stated to provide the most reliable method for separating the Hooded Oriole from the Orchard Oriole in the field?What is the visual characteristic described for the Hooded Oriole male's black pattern?Generally, what color is the female Hooded Oriole described as being above?What specific markings do Hooded Orioles typically exhibit on their wings?