Another old question.
The Howler was mentioned to be a Falcon second line unit, that was then later expanded to be a nominally wide spread mech, yet for some reason the name doesn't seem to fit the avian themed clans it was part of, per the MUL for the invasion setting.
I do understand that the bird theme wasn't that heavily enforced, but the name and look suggest more of a Fire Mandrill origin, much like the Mandrill which has a very simian look as well.
Was the mech meant to have been isorla, raid spoils, or shared production from another clan perhaps?