Telomere length and biological age in male hermit warblers across six breeding sites
In 122 male hermit warblers at six breeding sites, birds on high-elevation territories had longer telomeres than the population, suggesting lower biological age; vegetation, climate, age and body size showed little association. [1]
Automatic summary · not editorially reviewed
The key findings
Telomere length was measured in 122 male hermit warblers sampled at six breeding sites in the Pacific Northwest. [1]
Birds on high-elevation territories had significantly longer telomeres relative to the population, indicating lower biological age. [1]
Evidence for a negative relationship between conspecific density and telomere length was weak. [1]
The source at a glance
- Study type / format
- Observational field study reported in an abstract
- Population / context
- 122 male hermit warblers (Setophaga occidentalis) at six breeding sites in the Pacific Northwest.
- Summary based on
- Study abstract
- Publication status
- Preprint · peer-review status not confirmed
- Original publication
- July 18, 2026
Telomeres in 122 warblers at six sites
The study measured telomere length in 122 male hermit warblers (Setophaga occidentalis) sampled at six sites across the breeding range in the Pacific Northwest. Telomeres were treated as a marker integrating cumulative oxidative stress over a lifetime. The researchers asked whether telomere length was associated with environmental, geographic, social and individual factors: vegetation structure, climate, elevation, conspecific density, age and body size.
Supporting source [1]
Longer telomeres on high-elevation territories
Mixed-effects models suggested that birds occupying high-elevation territories had significantly longer telomeres relative to the population, indicating lower biological age. Vegetation structure, climate, age and body size showed little association with telomere length. There was weak evidence of a negative relationship between conspecific density and telomere length, suggesting competition may contribute to biological aging, though this effect was less supported.
Supporting source [1]
Association, not causation, in an abstract
The authors describe these results as an association between environmental context and biological age, not as proof that elevation causes slower aging. The density finding is explicitly weak. The abstract does not report how telomeres were measured, how old the birds were, or how long they were followed. Only the abstract was reviewed; the full text was not reviewed.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. The abstract does not report telomere measurement method, bird ages, follow-up duration or effect sizes. Results are associations in one species, not causal or human findings.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Sutton M, Rodriguez M, Kim H, Ruegg K, Betts M, LaManna JA. · europepmc.org · July 18, 2026