Fruit flies may weigh available evidence before making a decision.
Researchers from University of Oxford conducted odour-choice experiments using Drosophila fruit flies. The flies chose between two odour concentrations, one of which they had been trained to avoid.
When the concentrations were easy to tell apart, the flies made quick decisions and correctly moved to avoid the non-preferred odour – but when the concentrations were more similar the flies took longer to decide and made more errors.
Read more at University of Oxford