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#Fatty acid analysis of blood (e.g. Tierney et al. 2008 - https://t.co/itIxEN3VS6) & #DNA analysis of guano 🐧💩 (e.g. Deagle et al. 2007 - https://t.co/yIf3O0ldAi) are other methods that scientists use to estimate the diets of penguins. #OCS4012 #Roscia