FusionDex.org

Groups of Weavbat fly above the snowy tundra in search of large prey like Mamoswine from which to suck blood. After consuming blood, their feathered crest glows brighter, and the Weavbat with the brightest glow leads the next hunt.

While living in pitch-black caverns, their eyes gradually grew shut and deprived them of vision. They live in cold regions, forming groups of four or five that hunt prey with impressive coordination.