I have a sun conure myself and she does the pre flight thing a lot when she wants to come out of her cage and at other times, she is flighted but doesn't come out of her cage unless I take her out and doesn't fly much, only as a last resort. She also does a lot of head bobbing at times, not sure what that means but she can be so funny at times.
Oddly as I never knew what sex she was I found out a couple of weeks ago she is indeed a female as she laid 3 eggs, she has been sitting on them and not coming out to spend the evenings on my shoulder but one more week the eggs will magically disappear and all will be forgotten.
Conures don't usually spread their tail feathers when sitting.