Hi, noobie here.] TL;DR: Are overlords still detectors? So I got the beta yesterday and I've been playing a bunch. Earlier today, I was in a ZvP and I was doing pretty well. However, the P teched up to dark templars which raped my army. So for the next fight, I brought over an overlord thinking that'd clear things up. Nope, still couldn't see the DTs. So, does zerg still have a mobile detector or what?
You'll need to morph them into overseers once you have the lair. Overlords can't detect. Also, the overseer moves faster than a non speedupgraded overlord. Use the changeling ability to sneak a unit in your opponents base.
Overseers (morph from Overlord, tier 2 ability) and spore crawlers detect. Fungal growth (infestor ability) will reveal cloaked/burrowed units it hits for the duration of the ability (just like SC1 queen ensnare and defiler plague).