After all the ominous scenes of Zombies behaving in new and weird ways, and engaging in strategy and other cognizant behaviors, as well as Eugene theorizing that they are evolving intelligence, it's almost kind of a letdown to know that it's merely a bunch of necrophiliacs leading the pack.
It would have been Z-Nation had they done that.
Answer to the problem? Somebody find a FLiR
https://www.flir.com/products/breac...MIrPiQ8YD93gIVAZ-fCh1ybwLjEAQYAiABEgKNavD_BwE
The Whisperers will show thermal blooming in the image--the zombies will not.