Helfer, G.; Fidler, A.; Vallone, D.; Foulkes, N. S.; Brandstätter, R.: Molecular analysis of clock gene expression in the avian brain. Chronobiology International 23 (1-2), pp. 113 - 127 (2009)

Helm, B.: Geographically distinct reproductive schedules in a changing world: Costly implications in captive Stonechats. Integrative and Comparative Biology 49 (5), pp. 563 - 579 (2009)

Helm, B.; Schwabl, I.; Gwinner, E.: Circannual basis of geographically distinct bird schedules. The Journal of Experimental Biology 212 (9), pp. 1259 - 1269 (2009)

Holland, R. A.; Thorup, K.; Gagliardo, A.; Bisson, I. A.; Knecht, E.; Mizrahi, D.; Wikelski, M.: Testing the role of sensory systems in the migratory heading of a songbird. The Journal of Experimental Biology 212 (24), pp. 4065 - 4071 (2009)

Holland, R. A.; Wikelski, M.: Studying the migratory behavior of individual bats: Current techniques and future directions. Journal of Mammalogy 90 (6), pp. 1324 - 1329 (2009)

Holland, R. A.; Wikelski, M.; Kuemmeth, F.; Bosque, C.: The secret life of oilbirds: New insights into the movement ecology of a unique avian frugivore. PLoS One 4 (12), e8264 (2009)

Jacot, A.; Valcu, M.; van Oers, K.; Kempenaers, B.: Experimental nest site limitation affects reproductive strategies and parental investment in a hole-nesting passerine. Animal Behaviour 77 (5), pp. 1075 - 1083 (2009)

Johannesen, J.; Moritz, R. F. A.; Simunek, H.; Seibt, U.; Wickler, W.: Species cohesion despite extreme inbreeding in a social spider. Journal of Evolutionary Biology 22 (5), pp. 1137 - 1142 (2009)

Johannesen, J.; Wickler, W.; Seibt, U.; Moritz, R. F. A.: Population history in social spiders repeated: Colony structure and lineage evolution in Stegodyphus mimosarum (Eresidae). Molecular Ecology 18 (13), pp. 2812 - 2818 (2009)

Kaissling, K.-E.: Olfactory perireceptor and receptor events in moths: A kinetic model revised. Journal of Comparative Physiology A-Neuroethology Sensory Neural and Behavioral Physiology 195 (10), pp. 895 - 922 (2009)

Kalthoff, D.; Breithaupt, A.; Helm, B.; Teifke, J. P.; Beer, M.: Migratory status is not related to the susceptibility to HPAIV H5N1 in an insectivorous passerine species. PLoS One 4 (7), e6170 (2009)

Kelly, J. F.; Bridge, E. S.; Fudickar, A. M.; Wassenaar, L. I.: A test of comparative equilibration for determining non-exchangeable stable hydrogen isotope values in complex organic materials. Rapid Communications in Mass Spectrometry 23 (15), pp. 2316 - 2320 (2009)

Kempenaers, B.: Behavioural Ecology: Cuckolder eggs come first. Current Biology 19 (9), pp. R364 - R366 (2009)

Kempenaers, B.; Forstmeier, W.: A quantitative genetic approach to understanding aggressive behavior. Behavioral and Brain Sciences 32 (3-4), pp. 282 - 283 (2009)

Kingma, S. A.; Hall, M. L.; Segelbacher, G.; Peters, A.: Radical loss of an extreme extra-pair mating system. BMC Ecology 9, 15 (2009)

Klauke, N.; Masello, J. F.; Quillfeldt, P.; Segelbacher, G.: Isolation of tetranucleotide microsatellite loci in the burrowing parrot (Cyanoliseus patagonus). Journal of Ornithology 150 (4), pp. 921 - 924 (2009)

Koch, M.; Möstl, E.; Steinmetz, H. W.; Clauss, M.; Masello, J. F.; Quillfeldt, P.: Non-invasive measurement of faecal glucocorticoid metabolites in Upland Geese Chloephaga picta. Polar Biology 32 (2), pp. 281 - 285 (2009)

Koene, J. M.; Montagne-Wajer, K.; Roelofs, D.; Ter Maat, A.: The fate of received sperm in the reproductive tract of a hermaphroditic snail and its implications for fertilisation. Evolutionary Ecology 23 (4), pp. 533 - 543 (2009)

Koeppen, U.; Geiter, O.; Fiedler, W.: Meldungen aus den Beringungszentralen. Vogelwarte - Zeitschrift für Vogelkunde 47 (2), pp. 139 - 141 (2009)

Kudernatsch, D.; Weis-Dootz, T.; Segelbacher, G.: Isolation of ten tetranucleotide microsatellite loci in the Northern Wheatear (Oenanthe oenanthe). Molecular Ecology Resources 9 (2), pp. 542 - 543 (2009)