Publications

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de Jager, M., Buitendijk, N., Baveco , H., Hornman, M., Kruckenberg, H., Kölzsch, A., Madsen, J., Moonen, S., Schreven, K. H. T. & Nolet, B. A. (2026). A multi-species model for goose management: Competition and facilitation drive space use of foraging geese. AMBIO: A Journal of the Human Environment, 55(2), 450-464. https://doi.org/10.1007/s13280-025-02206-9

Sørensen, S. L., Madsen, J. & Balsby, T. J. S. (2026). An analysis of farmers’ experiences with deterrence methods and investment in mitigation of agricultural crop damage caused by geese. PLoS One, 21(2), Article e0341807. https://doi.org/10.1371/journal.pone.0341807

Schreven, K. H. T., Versluijs, T. S. L., Boom, M. P., Cottaar, F., Kuijken, E., Pessa, J., Tombre, I. M., Verscheure, C., Madsen, J. & Nolet, B. A. (2026). Arctic geese in newly colonised, colder breeding areas have higher spring body mass and breed earlier relative to the onset of spring. Journal of Animal Ecology, 95(1), 97-114. https://doi.org/10.1111/1365-2656.70172

Zhao, Q., Meng, F., Cao, L., Zhang, J., Gu, D., Batbayar, N., Rozenfeld, S. B., Solovyeva, D. V., Bysykatova-Harmey, I., Damba, I., Shimada, T., Lee, H., Xie, Y. & Fox, A. D. (2026). Assessing exchange rates of individuals between biogeographical populations of East Asian goose and swan species. Ibis, 168(2), 805-814. https://doi.org/10.1111/ibi.70019

Wilson, J. P., Amano, T., Bregnballe, T., Corregidor-Castro, A., Francis, R., Gallego-García, D., Hodgson, J. C., Jones, L. R., Luque-Fernández, C. R., Marchowski, D., McEvoy, J., McKellar, A. E., Oosthuizen, W. C., Pfeifer, C., Renner, M., Sarasola, J. H., Sokač, M., Valle, R., Zbyryt, A. & Fuller, R. A. (2026). Big Bird: A global dataset of birds in drone imagery annotated to species level. Remote Sensing in Ecology and Conservation. Advance online publication. https://doi.org/10.1002/rse2.70059

Holm, T. E. & Balsby, T. J. S. (2026). Blåhals, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A177, vers. 3 https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA177_Blaahals_v3.pdf

Bregnballe, T., Gregersen, J. & Sterup, J. (2026). Breeding performance in Great Cormorants: Factors of importance for spatiotemporal variation in Danish waters.

Scott-Hayward, L., Petersen, I. K., MacKenzie, M., Pedersen, C. L., Isojunno, S., Nielsen, R. D., Sterup, J., Thomsen, H. M. & Neergaard, R. S. (2026). Changes in the distribution and abundance of common scoter and diver species in the Horns Rev I, II and III offshore windfarm areas, Denmark, 2025: Bird distribution responses to wind farms, Horns Rev. Energistyrelsen. https://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Eksterne_udgivelser/2025/North_Sea_1_Habitueringsrapport_Y2_final_version.pdf

de Jager, M., Buitendijk, N. H., Baveco, J. M., Hornman, M., Kruckenberg, H., Kölzsch, A., Madsen, J., Moonen, S., Schreven, K. H. T. & Nolet, B. A. (2026). Correction: A multi-species model for goose management: Competition and facilitation drive space use of foraging geese (Ambio, (2026), 55, 2, (450-464), 10.1007/s13280-025-02206-9). Ambio, 55(2), 465-466. https://doi.org/10.1007/s13280-025-02279-6

Buij, R., Moonen, S., Müskens, G., van der Horst, Y., Kruckenberg, H., Liljebäck, N., Månsson, J., Koffijberg, K., van der Jeugd, H., Nolet, B. A., Baveco , H. & Madsen, J. (2026). Crippling rates of waterfowl by gunshot in Northwestern Europe: interspecific and geographic differences give clues to possible management challenges and options. European Journal of Wildlife Research, 72(2), Article 35. https://doi.org/10.1007/s10344-026-02070-2

Sunde, P., Holopainen, S., Elmeros, M., Krüger, H., Aronsson, M., Dahl, F., Jaatinen, K., Åhlén, P. A. & Fox, A. D. (2026). Diet composition of a generalist predator does not indicate its population impact on prey: a response to Pagh et al. (2025). European Journal of Wildlife Research, 72(2), Article 27. https://doi.org/10.1007/s10344-026-02065-z

Heldbjerg, H. & Clausen, P. (2026). Effekten af ekstensiv drift på udvalgte eng- og andefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. Fagligt notat fra DCE – Nationalt Center for Miljø og Energi (2020-...) Vol. 2026 No. 23 https://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Notater_2026/N2026_23.pdf

Schindler, A. R., Fox, A. D., Walsh, A. J., Griffin, L., Kelly, S. B. A. & Weegman, M. D. (2026). Environmental drivers of metapopulation dynamics throughout the full annual cycle in a declining Arctic-nesting migratory herbivore. Journal of Animal Ecology, 95(5), 865-881. https://doi.org/10.1111/1365-2656.70236

Holm, T. E., Pedersen, C. L. & Balsby, T. J. S. (2026). Estimation of national populations for nine Annex I breeding bird species in Denmark. Environmental and Experimental Biology, 24(1), 23-29. https://doi.org/10.22364/eeb.24.04

J. Pain, D., Green, R. E., Kanstrup, N. & Mateo, R. (2026). EU regulation: An unprecedented opportunity to protect children’s and wildlife health from the toxic effects of lead ammunition. Ambio, 55(1), 47-55. https://doi.org/10.1007/s13280-025-02219-4

Clausen, K. K., Vergin, L. & Madsen, J. (2026). Forekomst og antal af tajgasædgæs i det nordøstlige og centrale Jylland i vinteren 2025/26. Aarhus University, DCE - Danish Centre for Environment and Energy. Teknisk rapport fra DCE - Nationalt Center for Miljø og Energi No. 389 https://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Tekniske_rapporter_350-400/TR389.pdf

Rasmussen, S. L., Macdonald, D. W., Hansen, R. N. R., Thomsen, H. M., Lauridsen, H., Alstrup, A. K. O. & Christensen-Dalsgaard, J. (2026). Hearing and anatomy of the ear of the European hedgehog Erinaceus europaeus. Biology Letters, 22(3), Article 20250535. https://doi.org/10.1098/rsbl.2025.0535

Thomsen, H. M., Rasmussen, S. L., Christensen-Dalsgaard, J., Alstrup, A. K. O., Hansen, R. N. R., Lauridsen, H. & Macdonald, D. (2026). Hearing in the European hedgehog. Abstract from International Conference for Hedgehog Professionals 2026, København, Denmark. https://hedgehogconference.com/conference-abstract-books/

Holm, T. E. & Balsby, T. J. S. (2026). Hedelærke, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A175, vers. 3 https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA175Hedelaerke_v3.pdf

Polakowski, M., Jankowiak, Ł. & Fox, A. D. (2026). Intraspecific interactions in spring-staging geese reflect mate guarding and proximity to nesting dates. Scientific Reports, 16(1), Article 13608. https://doi.org/10.1038/s41598-026-43082-x

Holm, T. E. (2026). Isfugl, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A167, vers. 3 https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA167Isfugl_v3.pdf

Clausen, K. K., Sterup, J., Pedersen, K. T. & Bregnballe, T. (2026). Is shooting of cormorants in Danish waters adding to the population decline of the carbo sub-species in Norway?.

Heldbjerg, H. (2026, Jan). Jubilæumsfugl, januar 2026: Grågås. Dansk Ornitologisk Forening. https://www.dof-syd.dk/images/Maanedens_fugl/Jubil%C3%A6umsfugl_januar_2026__Gr%C3%A5g%C3%A5s.pdf

Bregnballe, T., Thorup, O. & Holm, T. E. (2026). Klyde, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A131, vers. 4. https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA131Klyde_v4.pdf

Pedersen, S., Pedersen, H. C., Kalleberg, S. & Mayer, M. (2026). Long-distance dispersal in mountain hare revealed by GPS collaring. Ecology, 107(5), Article e70414. https://doi.org/10.1002/ecy.70414

Fleet, F. A. & Bregnballe, T. (2026). Long-term Great Cormorant (Phalacrocorax carbo) diet data as a tool for understanding fish–bird interactions in Danish coastal ecosystems (1980–2024). Poster session presented at Det 23. Danske Havforskermøde , Helsingør, Denmark.

Bregnballe, T., Sterup, J., Herrmann, C. & Lundström, K. (2026). Managing Great Cormorant colonies in the Baltic Sea region: Actions taken and lessons learned. Poster session presented at 11th International Conference on Cormorants, Prague, Czech Republic.

Hjulsager, C. K., Yuan, L., Thorup, C., Larsen, L. E., Breum, S. & Bregnballe, T. (2026). Mass mortalities caused by different genotypes of HPAIVH5N1 clade 2.3.4.4b in colony breeding Black-headedGulls and Sandwich Terns in Denmark 2022 and 2023. Canadian Journal of Microbiology, 72, 1-10. https://doi.org/10.1139/cjm-2025-0182

Vergin, L., Madsen, J., Fox, A. D., Therkildsen, O. R. & Clausen, K. K. (2026). Migratory geese adjust wintering movements to both short-term weather and long-term climatic change. Scientific Reports, 16(1), Article 10014. https://doi.org/10.1038/s41598-026-41003-6

Smeele, S. Q., Grethen, K. J., Brinkløv, S. M. M., Fjederholt, E. T. & Elmeros, M. (2026). Modelling offshore bat activity over Danish waters. Aarhus University, DCE - Danish Centre for Environment and Energy. Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi Vol. 2026 No. 691 https://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Videnskabelige_rapporter_600-699/SR691.pdf

Holm, T. E., Pedersen, C. L., Kjeldsen, J. P. & Madsen, J. (2026). Overvågning af gæs på overnatningspladser med drone: Metoder til korrigering af bestandsdata fra landbaserede tællinger . Aarhus University, DCE - Danish Centre for Environment and Energy. Teknisk rapport fra DCE - Nationalt Center for Miljø og Energi Vol. 2026 No. 372 https://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Tekniske_rapporter_350-400/TR372.pdf

Holm, T. E. & Balsby, T. J. S. (2026). Plettet rørvagtel, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A126, vers. 4 https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA126_PlettetRoervagtel_v4.pdf

Madsen, J. & Balsby, T. J. S. (2026). Rastende bramgæs omkring Københavns Lufthavn, Kastrup: Effekter af reguleringsjagt på gæs og foreløbig vurdering af risiko for kollisioner mellem gæs og fly. Aarhus University, DCE - Danish Centre for Environment and Energy. Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi No. 707 https://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Videnskabelige_rapporter_700-800/SR707.pdf

Sterup, J., Jaatinen, K., Aleksi, M. & Bregnballe, T. (2026). Reactions to a returning predator: How White-tailed Eagles influence Great Cormorant breeding habits. Poster session presented at 11th International Conference on Cormorants, Prague, Czech Republic.

Heldbjerg, H. & Balsby, T. J. S. (2026). Regulering af fugle i salatmarker: Forsøgsdesign til måling af effekt af anvendelse af kunstige lokkefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. Fagligt notat fra DCE – Nationalt Center for Miljø og Energi (2020-...) Vol. 2026 No. 04 https://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Notater_2026/N2026_04.pdf

Grethen, K. J., Candelotto, L., Gómez, Y. & Toscano, M. J. (2026). Relationship between agonistic behaviour, physical condition and movement patterns of laying hens in aviaries. Applied Animal Behaviour Science, 295, Article 106889. https://doi.org/10.1016/j.applanim.2025.106889

Isojunno, S., Scott-Hayward, L., Pedersen, C. L., Thomsen, H. M., Frederiksen, M., Bregnballe, T., Sterup, J., Nielsen, R. D., Balsby, T. J. S., MacKenzie, M. & Petersen, I. K. (2026). Relative risk to seabirds from future offshore wind energy developments in Danish waters: Spatial distribution and cumulative development scenarios. Aarhus University, DCE - Danish Centre for Environment and Energy. Teknisk rapport fra DCE - Nationalt Center for Miljø og Energi Vol. 2026 No. 367 https://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Tekniske_rapporter_350-400/TR367.pdf

Holm, T. E. (2026). Rød glente, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A112, vers. 4 https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA112RoedGlente_v4.pdf

Laursen, K., Bregnballe, T. & Thorup, O. (2026). Saltvandssøen – hvorfor er det gået så godt? Dansk Ornitologisk Forenings Tidsskrift, 120(1), 4-6.

Madsen, J., Hansen, H. P., Clausen, K. K., Jeppesen, A. S. & Fox, G. F., (2026). Samforvaltning i praksis – forsøg med bramgæs i Guldborgsund Kommune: Slutrapport med konklusioner og anbefalinger, 18 p., Fagligt notat fra DCE – Nationalt Center for Miljø og Energi (2020-...) Vol. 2026 No. 11 https://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Notater_2026/N2026_11.pdf

Bregnballe, T. & Holm, T. E. (2026). Skestork, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A106, vers. 4 https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA106_Skestork_v4.pdf

Holm, T. E. & Balsby, T. J. S. (2026). Sortspætte, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A171, vers. 3 https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA171_sortspaette_v3.pdf

Zhang, J., Zhang, Y., Damba, I., Batbayar, N., Xu, Z., Cao, L. & Fox, A. D. (2026). Spatiotemporal variation in potential gosling development windows across Mongolian Plateau in relation to climate change. Avian Research, 17(1), Article 100333. https://doi.org/10.1016/j.avrs.2025.100333

Holm, T. E. (2026). Stor hornugle, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A162, vers. 3 https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA162StorHornugleV3.pdf

Holm, T. E. & Thorup, O. (2026). Stor kobbersneppe, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A140, vers. 3 https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA140StorKobbersneppe_v3.pdf

Bregnballe, T. & Holm, T. E. (2026). Tejst, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A184, vers. 3 https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA184_Tejst_v3.pdf

Holm, T. E. & Balsby, T. J. S. (2026). Trane, overvågning af ynglefugle. Aarhus University, DCE - Danish Centre for Environment and Energy. DCE, Teknisk anvisning fra Fagdatacenter for Biodiversitet og Terrestrisk Natur No. A128, vers. 4. https://ecos.au.dk/fileadmin/ecos/Fagdatacentre/Biodiversitet/TAA128Trane_v4.pdf

Koffijberg, K., Baumung, S., Bregnballe, T., Enners, L., Frikke, J., Gnep, B., Hansen, M. B., Müller, G. & Packmor, F. (2026). Trends of Breeding Birds in the Wadden Sea 1991-2023 and results of the total count in 2018. Zenodo. https://doi.org/10.5281/zenodo.18326676

Bregnballe, T., Lundström, K., Søndergaard, F. M., Sterup, J. & Holm, T. E. (2026). Using drones to monitor nest numbers and breeding success in cormorant colonies. Poster session presented at 11th International Conference on Cormorants, Prague, Czech Republic.

Fleet, F. A. & Bregnballe, T. (2026). Using long-term cormorant diet data to understand fish–bird interactions. Poster session presented at 11th International Conference on Cormorants, Prague, Czech Republic.

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