The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The prey that would be unique to the short-eared owl of Cuba would be the gull, precisely, the gull bones.
This bird, the short-eared owl not only can be seen in Cuba but in some regions of North America. It is a morning bird that also likes to hunt in the evening when the sun comes down and its preys are on the surface of the land.
During the spring, the owl flies to arctic islands, as part of its annual migration.