Final answer:
The Trojan horse in Vergil's depiction does not have the ability to fly; that characteristic is associated with Pegasus, not the Trojan horse which was massive, had soldiers hidden inside, and was wooden.
Step-by-step explanation:
The element of the imagery in Vergil's depiction of the Trojan horse that is NOT present is the horse's ability to fly. Vergil's account in the Aeneid doesn't endow the Trojan horse with the ability to fly. Instead, the pivotal aspects of the horse as described include its massive size, the hidden soldiers inside, and its construction made of wood. These elements contribute to the overall impact and symbolism of the horse in the narrative, but at no point does it have the mythical attribute of flight. This quality of flight is actually associated with Pegasus, a different mythological horse. The Trojan horse's imagery is grounded in the physical and tactical ruse that led to the downfall of Troy, not in supernatural abilities.