All Stories

  1. Flexibility in the diel migratory schedule of an Arctic songbird despite robust 24‐h activity rhythms across the annual cycle

    Article • Journal of Avian Biology, September 2025, Wiley

    Nicholas Per Huffeldt

  2. Short photoperiods end autumn migration in a naïve diurnal migrant

    Article • Animal Behaviour, September 2024, Elsevier

    Nicholas Per Huffeldt

  3. Activity of predators in seabird colonies decreases during the darkest compared to the brightest phase of the diel cycle below, but not above, the Arctic Circle

    Article • Arctic Antarctic and Alpine Research, July 2024, Taylor & Francis

    Nicholas Per Huffeldt

  4. Thick-billed Murres in breeding pairs migrate and overwinter far apart but in similar photic environments

    Article • Journal of Ornithology, April 2024, Springer Science + Business Media

    Nicholas Per Huffeldt

  5. Spatial distribution of selenium-mercury in Arctic seabirds

    Article • Environmental Pollution, February 2024, Elsevier

    Nicholas Per Huffeldt

  6. Mercury contamination and potential health risks to Arctic seabirds and shorebirds

    Article • The Science of The Total Environment, October 2022, Elsevier

    Nicholas Per Huffeldt

  7. Foraging range scales with colony size in high-latitude seabirds

    Article • Current Biology, September 2022, Elsevier

    Nicholas Per Huffeldt

  8. Changing winter diet of Thick-billed Murres (Uria lomvia) in southwest Greenland, 1990s versus 2010s

    Article • Canadian Journal of Zoology, December 2021, Canadian Science Publishing

    Nicholas Per Huffeldt

  9. Habitat when foraging does not explain temporal segregation by sex in a breeding seabird

    Article • Marine Biology, September 2021, Springer Science + Business Media

    Nicholas Per Huffeldt

  10. North Atlantic winter cyclones starve seabirds

    Article • Current Biology, September 2021, Elsevier

    Nicholas Per Huffeldt

  11. Spatial variation in vital rates and population growth of thick-billed murres in the Atlantic Arctic

    Article • Marine Ecology Progress Series, August 2021, Inter-Research Science Center

    Nicholas Per Huffeldt

  12. Multispecies tracking reveals a major seabird hotspot in the North Atlantic

    Article • Conservation Letters, August 2021, Wiley

    Dr. Jaime Ramos, Dr Iain J Stenhouse, Nicholas Per Huffeldt

  13. Importance of Photic Constraints Depends on the Population

    Article • Trends in Ecology & Evolution, June 2021, Elsevier

    Nicholas Per Huffeldt

  14. The relationship between daily behavior, hormones, and a color dimorphism in a seabird under natural continuous light

    Article • Hormones and Behavior, April 2021, Elsevier

    Nicholas Per Huffeldt

  15. Meeting Paris agreement objectives will temper seabird winter distribution shifts in the North Atlantic Ocean

    Article • Global Change Biology, January 2021, Wiley

    Nicholas Per Huffeldt

  16. Seasonal variation of mercury contamination in Arctic seabirds: A pan-Arctic assessment

    Article • The Science of The Total Environment, January 2021, Elsevier

    Nicholas Per Huffeldt

  17. Performance of horned puffins (Fratercula corniculata) on an object permanence task

    Article • Behavioural Processes, December 2020, Elsevier

    Nicholas Per Huffeldt

  18. Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle

    Article • Royal Society Open Science, October 2020, Royal Society Publishing

    Nicholas Per Huffeldt

  19. Photic Barriers to Poleward Range-shifts

    Article • Trends in Ecology & Evolution, August 2020, Elsevier

    Nicholas Per Huffeldt

  20. Melatonin and corticosterone profiles under polar day in a seabird with sexually opposite activity-rhythms

    Article • General and Comparative Endocrinology, January 2020, Elsevier

    Nicholas Per Huffeldt

  21. Sex-specific, inverted rhythms of breeding-site attendance in an Arctic seabird

    Article • Proceedings of the Royal Society B Biological Sciences, September 2016, Royal Society Publishing

    Nicholas Per Huffeldt

  22. A Riemannian geometry theory of human movement: The geodesic synergy hypothesis

    Article • Human Movement Science, December 2015, Elsevier

    Nicholas Per Huffeldt

  23. Inferring seabird activity budgets from leg-mounted time–depth recorders

    Article • Journal of Ornithology, October 2013, Springer Science + Business Media

    Nicholas Per Huffeldt

  24. Time-lapse photography for monitoring group-living organisms

    Article • Waterbirds, September 2013, Waterbird Society

    Nicholas Per Huffeldt

  25. Nest site dispersal of barn owls

    Article • Bird Study, May 2012, Taylor & Francis

    Nicholas Per Huffeldt