Gnezdo are a type of Complete Mutation birthed from C-Viruschrysalids, its name means "nest" in Serbian. They appear as a swarm of insects that merge to form a humanoid female figure, strangely enough even if the human infected was a male. A larger insect serves as the 'Queen' of the swarm and directs the creature as a hive mind, whilst the smaller insects act as a protective barrier. The queen hides within the swarm and only emerges if the swarm is broken apart by extreme physical trauma. Destroying the Queen is the only way to eliminate the Gnezdo.