Floral Zerg Infestors are a walking bug hives that literally shoot with bug swarms instead of just infesting their targets.

Floral Zerg Guardians are strangest among their strain for that instead providing the ranged defenses for Zerg Hive Clusters, they counter-attack the aggressors with powerful ram attacks, covered with some sort of resin that harden on their frontal organs it comes from.

(Zerg Infestor and Zerg Guardian belongs to Blizzard)