The nuptial pads in these pics are pretty typical of Anaxyrus males. Certainly, the local American, Woodhouse's, Fowler's, etc. toads look pretty much like this, sometimes darker... Vida's pads are present year round but seem darker and rougher in the spring... It's a good bet that any mature toad with a thick rough thumb is a male. The females (will post pic soon) have positively delicate thumbs by comparison.