Howlers

Howlers are one of the most fascinating creatures in all of the Universe. Howlers are humanoid, and wear metal biosuits. Howlers are attracted to bright lights and church music, it is theorized they are attracted to church music because it sounds similar to their blood-curdling howl, this is probably false. Howlers have the uncanny ability to rotate their upper torso / head 360 degrees.

Howlers have highly pressurized, yellow, acidic blood. This pressurized blood is thought to be used as some kind of digestion or reproduction method (See Note B).

Note B (Doctor Murtaugh's Report)
I have reason to believe that Howlers have blood that is used as both a reproduction method and digestion process. Read below.

I've heard reports of howlers "eating" people that have been sprayed with their pressurized acid blood. This blood actually paralyzes/decays victims. However, it may be also used as a reproduction method, according to Oscar's theory. Oscar says that the blood may just paralyze and burn hosts, but it may seep into their skin and "mutate" them, then they are given a suit for whatever reason.

Oscar says that the Howlers work in a hivemind, and use the suits as their "armor" or "uniform". He also says that it might be some interspecies assimilation thing, which it most likely is.

It's really disturbing just thinking about what these things could do to the carpens or Incompatible, or even the Sentinels and Administrators.

-Doc Mur