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August 5, 2025Open Access

Bird colours in urban mosaics: a study of two passerines

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Authors

KJKatarzyna JanasMCMarion ChatelainMCMichela Corsini

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Overview

Research shows urbanization alters carotenoid and melanin traits in great and blue tits, suggesting complex eco-evolutionary changes.

Key Points

  • Urban habitats lead to decreased carotenoid chroma in great tit plumage, indicating an urban dullness effect.
  • Phenotypic variation in bird colours was higher in urban settings, likely due to environmental heterogeneity.
  • The study analyzed bird colour traits across multiple urban habitats in eight Polish cities, emphasizing broad urban influences.
  • Findings enhance understanding of eco-evolutionary processes in urban ecosystems, highlighting the need for diverse species research.

Cite This Study

Janas et al. (2025) studied this question.

synapsesocial.com/papers/689a0f99e6551bb0af8d137bhttps://doi.org/10.1101/2025.07.15.664885
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Replicated urban mosaics reveal trait- and species-specific shifts in carotenoid and structural plumage colouration of two passerines2026
  2. 2Disentangling urbanisation, climate effects and their interaction on ornamental colourations2025
  3. 3Unmasking black and yellow in a common garden: genetic and environmental drivers of urban colour divergence2026 · 1 citations
  4. 4Urbanization as an environmental filter for megacolorful birds2024
  5. 5An Analysis of Great Tit Egg Traits Across the City Mosaic: Urbanisation Does Not Affect Egg Size and Pigmentation Patterns2026