Banner for Swarm Host guide

The Swarm Host has no weapons of its own, but can represent an army unto itself. Generated by the Infestation Pit, it spawns parasitic symbiotes known as Locusts, which attack any nearby enemies with volleys of acidic saliva. This crawling monstrosity burrows into the ground in order to provide a seemingly endless supply of ferocious biological minions, and is often used in defensive maneuvers.

About banner.
Nydus worm is from HOTS CGI trailer. Swarm Host itself is a screenshoted/photoshoped a bit unit model from Galaxy Editor from unit portrait.
Zerg borders (in original article) are from game resources, just recolored and brighted up.

Guide about Swarm Hosts:
Russian - [link]
English - [link]