Board Thread:Questions and Answers/@comment-28019357-20160320235151/@comment-25942629-20160509232317

In the beginning, I don't think they were looking for vampires in the first place or knew what exactly characteristics made them stand apart. How can you look for something without knowing what it looks like? By the time Vampire Reign begins, the humans are familiar with a vampire's characteristics. In Catastrophe, Guren and Shinya identify the first one they see by her obscene level of strength and then just focus on running for their lives.

Human!Crowley only saw a vampire once before then, and he was half-dead and thoroughly distracted when that happened. He even believed he may have hallucinated everything, so his memory was completely unreliable. He was more focused on surviving than looking for details that made that monster stand out. Given his state of mind at the time, the only thing he can be sure of is that it was insanely strong.

As for the body heat, the vampires cover most of their skin in clothing, even going so far as to wear gloves.