The American Ornithological Society (AOS) announced the recipients of its 2026 Kessel Fellowships for Ornithological Research, spotlighting early-career scientists tackling cutting-edge questions in avian biology. Among the standout awardees is Dr. Audrey Le Pogam of Université du Québec à Rimouski, who received a $30,000 fellowship to study how rising Arctic temperatures affect reproduction in Snow Buntings, a cold-adapted songbird experiencing dramatic population declines in Canada.
Le Pogam’s research probes the physiological and behavioral constraints imposed by heat stress during the breeding season. Despite Snow Buntings’ extraordinary cold tolerance, they possess limited capacity to dissipate heat, a critical vulnerability amid an Arctic warming at twice the global average. Using RFID-based body temperature loggers, microclimate stations, and 3D-printed bird models, her team aims to quantify the operative temperatures experienced by nesting adults in both High and Low Arctic populations. This integrative approach links thermal environments with parental feeding rates, clutch sizes, and fledging success, unveiling temperature thresholds beyond which reproductive performance falters.
Another pioneer, Dr. Carrie Ann Adams, is exploring how artificial light pollution disrupts nocturnal migratory birds. Employing portable radar and multi-spectral light arrays varying in blue wavelength content, her study examines bird attraction or avoidance behaviors under foggy conditions, exposing the complex interactions between light spectra, weather, and avian navigation. Given the global transition to blue-enriched LED lighting, this research sheds vital light on conservation strategies to mitigate migration-related mortality.
Postdoctoral fellow Dr. David Diez-Méndez investigates the role of the gut microbiome in avian adaptation to extreme Arctic light-dark cycles. Focusing on Great Tits recently colonizing northern latitudes, his work evaluates whether microbial circadian rhythms, modulated by feeding patterns, function as internal timekeepers in the absence of conventional photic cues. This innovative angle may illuminate mechanisms enabling birds’ successful range expansions in response to climate change.
Meanwhile, Dr. Jennifer L. Houtz studies how temperature-induced shifts in gut microbial communities influence immune responses in Eastern Bluebird nestlings. By examining microbiome composition across thermal gradients and experimental temperature treatments, her work aims to decipher how rising temperatures affect host-parasite dynamics, with implications for disease susceptibility and avian fitness.
At Hofstra University, Dr. Abby Kimmitt simulates week-long heat waves to unravel the neuroendocrine and behavioral responses of House Sparrows, a globally widespread species. Her research evaluates sex-specific variations in thermoregulatory behaviors, hormonal signaling, and hypothalamic gene expression under heat stress, illuminating physiological resilience mechanisms crucial for forecasting population persistence amid climate extremes.
Dr. Amy Yanagitsuru delves into the biology of perennial monogamy using Atlantic Puffins as a model, combining physiological, behavioral, and reproductive data to decode how long-term pair bonds enhance breeding success. Her work addresses fundamental questions about teamwork, role specialization, and nest-site loyalty, advancing understanding of complex social systems in birds.
Finally, Dr. Laura E. Nuñez-Rosas examines the energetics of torpor during reproduction in hummingbirds across diverse Mexican ecosystems. By relating nest microhabitat thermal buffering to maternal torpor use and reproductive outcomes, she provides rare field-based insights into how tiny birds balance extreme energetic demands under environmental constraints.
Together, these Kessel Fellows represent the forefront of ornithological research, blending physiology, behavior, ecology, and conservation biology to tackle pressing challenges posed by climate change and anthropogenic impacts on bird populations worldwide. Their work not only advances fundamental understanding but promises practical, science-driven strategies to safeguard avian biodiversity in a rapidly changing world.
Subject of Research: Ornithological research on avian physiology, behavior, ecology, and conservation in the context of climate change and anthropogenic impacts.
Article Title: American Ornithological Society Awards 2026 Kessel Fellowships to Early-Career Bird Researchers
News Publication Date: July 13, 2026
Web References:
https://americanornithology.org/awards-grants/research-grants/kessel-fellowships/
Image Credits: Audrey Le Pogam
