Final answer:
Red-eyed Vireos and many other songbirds have a black line through the eye known as an eye stripe or eye line, and a white stripe above it, called an eyebrow stripe or superciliary line.
Step-by-step explanation:
Many songbirds, such as the Red-eyed Vireos, have distinctive markings around their eyes which are important for identification and potentially have biological functions, like visual communication or camouflage. These marks include a black line through the eye, which is known as an eye stripe or eye line, and a white stripe above it, often called an eyebrow stripe or superciliary line. Notably, other birds like Yellow buntings and certain species of butterflies such as Aglais urticae also possess eye-related features, for example, the butterflies have eyespots on their wings which may serve to mimic the eyes of predators like owls and thus protect them from bird attacks.