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Adachi, I., Chou, D.P. & Hampton, R.R. 2009. Thatcher effect in monkeys demonstrates conservation of face perception across primates. Current Biology 19: 1270-1273. 
Auersperg, A.M.I., Gajdon, G.K. & Huber, L. 2009. Kea (Nestor notabilis) consider spatial relationships between objects in the support problem. Biology Letters 5: 455-458. 
Bailey, N.W. & Zuk, M. 2009. Field crickets change mating preferences using remembered social information. Biology Letters 5: 449-451. 
Bauer, S., Barta, Z., Ens, B.J., Hays, G.C., McNamara, J.M. & Klaassen, M. 2009. Animal migration: linking models and data beyond taxonomic limits. Biology Letters 5: 433-435.