Partecke, J.; Schwabl, I.; Gwinner, E.: Stress and the city: Urbanization and its effects on the stress physiology in European Blackbirds. Ecology 87 (8), S. 1945 - 1952 (2006)

Perfito, N.; Bentley, G. E.; Hau, M.: Tonic activation of brain GnRH immunoreactivity despite reduction of peripheral reproductive parameters in opportunistically breeding zebra finches. Brain, behavior and evolution: Official journal of the J. B. Johnston Club 67 (3), S. 123 - 134 (2006)

Peters, A.; Delhey, K.; Goymann, W.; Kempenaers, B.: Age-dependent association between testosterone and crown UV coloration in male blue tits (Parus caeruleus). Behavioral Ecology and Sociobiology 59 (5), S. 666 - 673 (2006)

Pika, S.; Mitani, J. C.: Referential gestural communication in wild chimpanzees (Pan troglodytes). Current Biology 16 (6), S. R191 - R192 (2006)

Pika, S.; Nicoladis, M.; Marentette, P. F.: A cross-cultural study on the use of gestures: Evidence for cross-linguistic transfer? Bilingualism: Language and Cognition 9 (3), S. 319 - 327 (2006)

Poesel, A.; Kunc, H. P.; Foerster, K.; Johnsen, A.; Kempenaers, B.: Early birds are sexy: Male age, dawn song and extrapair paternity in blue tits, Cyanistes (formerly Parus) caeruleus. Animal Behaviour 72 (3), S. 531 - 538 (2006)

Popenko, V. M.; Formanyuk, O. A.; Bauchinger, U.; Trost, L.: New data on rare species (subspecies) of birds on Tarkhankut Peninsula (Crimea Republic). Branta 9 (14), S. 194 - 196 (2006)

Quillfeldt, P.; Masello, J. F.; Lubjuhn, T.: Variation in the adult body mass of Wilson's storm petrels Oceanites oceanicus during breeding. Polar Biology 29 (5), S. 372 - 378 (2006)

Quillfeldt, P.; Masello, J. F.; Strange, I. J.; Buchanan, K. L.: Begging and provisioning of thin-billed prions, Pachyptila belcheri, are related to testosterone and corticosterone. Animal Behaviour 71 (6), S. 1359 - 1369 (2006)

Rattenborg, N. C.: Evolution of slow-wave sleep and palliopallial connectivity in mammals and birds: A hypothesis. Brain Research Bulletin 69 (1), S. 20 - 29 (2006)

Rattenborg, N. C.: Do birds sleep in flight? Die Naturwissenschaften 93 (9), S. 413 - 425 (2006)

Rattenborg, N. C.: Schlaf und Flug. Jahrbuch - Max-Planck-Gesellschaft (2006)

Romero, L. M.; Wikelski, M.: Diurnal and nocturnal differences in hypothalamic-pituitary-adrenal axis function in Galapagos marine iguanas. General and Comparative Endocrinology 145 (2), S. 177 - 181 (2006)

Rutte, C.; Taborsky, M.; Brinkhof, M. W.; Bergstrom, C. T.; Antia, R.; Ranz, J. M.; Machado, C. A.; Wikelski, M.; Cooke, S. J.; Monaghan, P. et al.; Haussmann, M. F.: Ecology and evolution. Ecology 21 (1), S. 1 - 54 (2006)

Santoso, A.; Kaiser, A.; Winter, Y.: Individually dosed oral drug administration to socially-living transponder-tagged mice by a water dispenser under RFID control. Journal of Neuroscience Methods 153 (2), S. 208 - 213 (2006)

Schäfer, T.; Ledebur, G.; Beier, J.; Leisler, B.: Reproductive responses of two related coexisting songbird species to environmental changes: Global warming, competition, and population sizes. Journal of Ornithology 147 (1), S. 47 - 56 (2006)

Scheuerlein, A.; Gwinner, E.: Reduced nestling growth of East African Stonechats Saxicola torquata axillaris in the presence of a predator. Ibis 148 (3), S. 468 - 476 (2006)

Schmieder, K.; Werner, S.; Bauer, H.-G.: Submersed macrophytes as a food source for wintering waterbirds at Lake Constance. Aquatic Botany 84 (3), S. 245 - 250 (2006)

Schregardus, D. S.; Pieneman, A. W.; Ter Maat, A.; Jansen, R. F.; Brouwer, T. J. F.; Gahr, M.: A lightweight telemetry system for recording neuronal activity in freely behaving small animals. Journal of Neuroscience Methods 155 (1), S. 62 - 71 (2006)

Seibt, U.; Wickler, W.: Individuality in problem solving: String pulling in two Carduelis species (Aves: Passeriformes). Ethology 112 (5), S. 493 - 502 (2006)