you mean the other guys in the tau army who ain't tau? well, the guys with spiney heads carrying guns with spikes at either end are kroot, who are decent in close combat. the other guys with wings are vespids who carry guns that make marines quake in their power armoured booties
p.s. ya need to make yur posts a little more legable in future if you want answers to the questions you asked. the only reason i figured out what you were askin is that i speak garbled english too