Progressive color change in House Wren (Troglodytes aedon) eggs
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Having a better understanding of the organisms in our environment is essential to maintaining the best ecosystem possible. This study sought to determine whether house wren eggs become lighter the later they are laid in the clutch. We used reflectance spectrophotometry to demonstrate that eggs were not only becoming significantly lighter as more were laid, but that the greatest significant difference came between the last two eggs in each clutch. This may be a signaling mechanism to tell the female when to stop laying eggs.