We were hiking a wash through some Colorado desertscrub and not seeing anything at all. It happens.
We did see some other usual big desert things though, the things that I would have gone wild for when I was a kid, and the things that I see people tweet about as potential desert nightmares when they spend 45 minutes in layover at the airport. Giant centipedes, giant spiders, giant scorpions – the usual crew. This one was cool though, in that on closer inspection, we had also found our one and only snake of the night.