One of the things I notice most when Spring arrives in Virginia are the Red-eyed Vireos. They winter in South America, and arrive back in Virginia in early Spring. Most of the time you do not see them because they are in the canopy of trees picking bugs off of leaves. In the Spring and Summer, however, they sing pretty incessantly during the day, so it is very easy to detect their presence, even if you do not actually see them.
Here are a couple of photos I managed to get of Red-eyed Vireos while hiking South River Falls Trail.