Congratulations to Sean Power who successfully defended his MSc thesis entitled “Endogenous regulation of seasonal energetic phenotypes: investigating the hormonal mechanisms of fat gain and muscle growth across avian life-history stages in two Arctic birds”. Sean’s project was co-supervised by Dr. Francois Vezina at UQAR and included an impressive review of the hormonal controls of energetic stores in birds. Along with this, Sean also investigated a number of hormones that may regulate fat and muscle gain prior to energetically demanding life history stages in Snow Buntings and Common Eiders. Congratulations, Sean!