NOTICE: this is the author’s version of a work that was accepted for publication in Animal Behaviour. Changes resulting from the publishing process, such as editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Caetano, D. S., and A. Aisenberg. 2014. Forgotten treasures: the fate of data in animal behaviour studies. Animal Behaviour 98:1–5. DOI: 10.1016/j.anbehav.2014.09.025