In a multi-player game, a Zerg structure can be morphed from a Drone. When the morphing is complete, the Drone becomes the structure itself and can no longer be recovered.
Basic Structures
Basic Structures fulfill the essential tasks in Starcraft II. Wether you need to gather resources or train low tier units, or a Crawler to defend your base, these are the buildings you're looking for. If you need more advanced entities, have a look at the Advanced Structures.
Advanced Structures
Advanced Structures are the most important part of a longer game of Starcraft. If you're looking for more dangerous, flying or brutal units, access the Advanced Structures menu in your Drone's command panel and start showing off your combat expertise.
Others
Miscellaneous structures that are not built by Drones:
