Material structure papers
Bailey, I.E., Morgan, K.V., Bertin, M., Meddle, S.L. & Healy, S.D. 2014. Physical cognition: birds learn the structural efficacy of nest material. Proceedings of the Royal Society B, 281: 1784
Muth, F. & Healy, S.D. 2014. Zebra finches select nest material appropriate for a building task. Animal Behaviour 90: 237-244
