Ants have played an important role in the field of sex ratio research for many decades, serving as a focal taxon for studying sex ratio questions. My research is designed to critically examine some of what is known, and what is not well understood, about sex ratio expression in ants through careful study of the common Connecticut woodland ant, Aphaenogaster rudis. I will present population sex ratio data collected from two field populations of this species for two consecutive years. The data show significant variation between years. This result highlights the fact that proximate factors can strongly influence sex ratio expression and reinforces our need to better understand the role that non-genetic factors play in sex ratio expression.