Ko, M.-C.; Frankl-Vilches, C.; Bakker, A.; Gahr, M.: The gene expression profile of the song control nucleus HVC shows sex specificity, hormone responsiveness, and species specificity among songbirds. Frontiers in Neuroscience 15, 680530 (2021)

Koch, R. E.; Buchanan, K. L.; Casagrande, S.; Crino, O.; Dowling, D. K.; Hill, G. E.; Hood, W. R.; McKenzie, M.; Mariette, M. M.; Noble, D. W. A. et al.; Pavlova, A.; Seebacher, F.; Sunnucks, P.; Udino, E.; White, C. R.; Salin, K.; Stier, A.: Integrating mitochondrial aerobic metabolism into ecology and evolution. Trends in Ecology and Evolution 36 (4), pp. 321 - 332 (2021)

Küblbeck, M.; Feulner, J.: "Müssen wir nicht größer denken?" Nachgedanken zum 2. Braunkehlchen-Symposium. Ornithologischer Anzeiger 60 (1), pp. 103 - 107 (2021)

Küblbeck, M.; Liebel, H.; Goymann, W.: Was zeichnet ein gutes Braunkehlchen-Gebiet aus? Zur Einschätzung der Habitatqualität. Ornithologischer Anzeiger 60 (1), pp. 90 - 94 (2021)

Kuhl, H.; Frankl-Vilches, C.; Bakker, A.; Mayr, G.; Nikolaus, G.; Boerno, S. T.; Klages, S.; Timmermann, B.; Gahr, M.: An unbiased molecular approach using 3’-UTRs resolves the avian family-level tree of life. Molecular Biology and Evolution 38 (1), pp. 108 - 127 (2021)

Kupan, K.; Székely, T.; Cruz-López, M.; Seymour, K.; Küpper, C.: Offspring desertion with care? Chick mortality and plastic female desertion in Snowy Plovers. Behavioral Ecology 32 (3), pp. 428 - 439 (2021)

Laitly, A.; Callaghan, C. T.; Delhey, K.; Cornwell, W. K.: Is color data from citizen science photographs reliable for biodiversity research? Ecology and Evolution 11 (9), pp. 4071 - 4083 (2021)

Lardy, R.; de Boyer des Roches, A.; Capdeville, J.; Bastien, R.; Mounier, L.; Veissier, I.: Refinement of international recommendations for cubicles, based on the identification of associations between cubicle characteristics and dairy cow welfare measures. Journal of Dairy Science 104 (2), pp. 2164 - 2184 (2021)

Leitner, S.; Brighton, R.; Voigt, C.: Barred buttonquail males outlive females. Journal of Avian Biology 52 (10), e02722 (2021)

Lemazina, A.; Trost, L.; Gahr, M.; Hoffmann, S.: The multifaceted vocal duets of white-browed sparrow weavers are based on complex duetting rules. Journal of Avian Biology 52 (9), e02703 (2021)

Lewanzik, D.; Goerlitz, H. R.: Task-dependent vocal adjustments to optimize biosonar-based information acquisition. The Journal of Experimental Biology 224 (1), jeb234815 (2021)

Li, X.-Y.; Morozov, A.; Goymann, W.: Coevolution of female fidelity and male help in populations with alternative reproductive tactics. Proceedings of the Royal Society B: Biological Sciences 288 (1943), 20202371 (2021)

Linek, N.; Brzęk, P.; Gienapp, P.; O'Mara, M. T.; Pokrovsky, I. G.; Schmidt, A.; Shipley, J. R.; Taylor, J. R. E.; Tiainen, J.; Volkmer, T. et al.; Wikelski, M.; Partecke, J.: A partial migrant relies upon a range‑wide cue set but uses population‑specific weighting for migratory timing. BMC Movement Ecology 9, 63 (2021)

Liu, Y.; Zollinger, S. A.; Brumm, H.: Chronic exposure to urban noise during the vocal learning period does not lead to increased song frequencies in zebra finches. Behavioral Ecology and Sociobiology 75 (1), 3 (2021)

Loveland, J. L.; Giraldo Deck, L. M.; Lank, D. B.; Goymann, W.; Gahr, M.; Küpper, C.: Functional differences in the hypothalamic-pituitary-gonadal axis are associated with alternative reproductive tactics based on an inversion polymorphism. Hormones and Behavior 127, 104877 (2021)

Loveland, J. L.; Lank, D. B.; Küpper, C.: Gene expression modification by an autosomal inversion associated with three male mating morphs. Frontiers in Genetics 12, 641620 (2021)

Maldonado-Chaparro, A. A.; Forstmeier, W.; Farine, D. R.: Relationship quality underpins pair bond formation and subsequent reproductive performance. Animal Behaviour 182, pp. 43 - 58 (2021)

Malecore, E. M.; Berthelot, S.; van Kleunen, M.; Razanajatovo, M. H.: Reciprocal heterospecific pollen interference among alien and native species. Perspectives in Plant Ecology, Evolution and Systematics 50, 125610 (2021)

Malkoc, K.: Individuelle Anpassungen an wechselnde Umweltbedingungen bei Kohlmeisen: Wie stark reagieren Schilddrüsenhormone auf Temperaturveränderungen und Arbeitsleistung? Vogelwarte - Zeitschrift für Vogelkunde 59 (1), pp. 53 - 54 (2021)

Malkoc, K.; Casagrande, S.; Hau, M.: Inferring whole-organism metabolic rate from red blood cells in birds. Frontiers in Physiology 12, 691633 (2021)