[1] Backbone Unit [2] Can chew friends and foes alike to regain health. Upgrades to most other units types. [0] 
Hatchling
U n i t
L a b o r e r
W h i s p e r e r
H a t c h l i n g
C r e e p e r
S p i t t e r
S p o r e b e a r e r
D i s g o r g e r
R a n g e r