 Gouldian finches ("Erythrura gouldiae") exist in red- and black-headed subtypes, and these subtypes have been shown to have different levels of boldness (measured by the time taken to explore new areas, and other similar tests).Experiments placing black-headed birds (known to be less bold) in the company of red-headed birds (known to be more bold) resulted in the black-headed bird performing "bolder" behaviors, and red-headed birds became "shyer" in the presence of black-headed ones.The experimenters hypothesized that this individual-level conformity could lead to stronger social cohesion.