Best way to find NPC's when they spawn

[kulcris]

I am trying to make an addon that automatically sets a zombies body group (for headcrabs) to 0 but im not sure how the best way to find all zombies on the map without doing a radius search from players every few seconds. (seems like alot of wasted processing power ) i cant seem to find a "on npc spawn" hook unless its a player spawned npc i don't want to make the headcrab texture invisible (headcrab hats from pointshop)

[Rubat]

[url]http://wiki.garrysmod.com/page/GM/OnEntityCreated[/url]

[kulcris]

for _, v in pairs( ents.GetAll() ) do

Something along these lines. correct me if i am wrong please

[editline]14th December 2014[/editline]

oh right thanks so much. didnt think about "created" as apposed to spawned XD thanks