How does the upper side coloration of the adult female Eastern Bluebird compare to the male?
Answer
She is described as being grayish on the upper side, though her wings and tail retain blue coloration
While the male Eastern Bluebird is famously bluish above, the female is more subdued, having a grayish upper side, although blue persists in her wings and tail.

Related Questions
How do many birds achieve their structural blue coloration?Why might a bird with structural blue plumage appear greyer on a cloudy day?What key feature distinguishes the nest of the Blue-gray Gnatcatcher?Which physical characteristic is noted for the Blue-grey Tanager's bill?How does the upper side coloration of the adult female Eastern Bluebird compare to the male?Which specific color describes the belly of the female Western Bluebird?Where are Mountain Bluebirds typically found inhabiting?What is the distinctive description of the Blue Jay's underparts?What feature allows the female Blue Rock Thrush to show hints of blue?What field observation tip helps confirm blue in a seemingly grey bird under low light?