The lair is the most developed one. The one in the middle on the left. The one above it is the Hatchery, a lesser Lair.
Looks pretty cool though. However, the spike tower on it on the right isn't very good. The Lair has 3 spikes coming up from the ground and the 3rd looks like it's not even there. I'm not even sure if the one on the left is a spike either, it looks a bit out of place.
Looks good though for a lack of Zerg buildings we have to begin with.