A female fence lizard sports blue markings, a male trait that makes her less appealing to potential mates. Langkilde Lab, Penn State University For female fence lizards, it's just not easy being blue.

Bounce, shimmy, scurry then one, two, three push ups. One more push up then a flattening of the sides and a flare of the chin. He lifts his nose and the belly is exposed, iridescent blue and ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. For female fence lizards, it's just not easy being blue. For one, the guys all ignore you.