What's bright yellow and red, has no feathers, sports a set of zombie claws, and has glowing red eyes slewed up into its hairline? Why, it's a Night Bird, of course!
Because what says "night time" better than vivid primary colors? And what says "bird" better than wearing absolutely nothing that says "bird"? Throw in the fact that this guy has the arms of an orangutang and you've got a full-blown zoological disaster:
Nothing about this costume jumps out as horrible; it's all basic super-hero standard gear. It just doesn't have anything at all to do with what the character is supposed to represent, which after all is the point. I mean, it's as if this guy just found some random outfit in a box ... oh, wait:
Well. I guess that explains that.
(Images from "The Green Mask" number 6, 1940.)