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Eurasian Jays in Stavropol Concentrated in Food-Rich Habitats in Winter

Eurasian jay carrying a nut on a branch in Yerevan, Armenia
Research · Ecology

A new 2026 analysis of Eurasian jay records from the Stavropol region found that habitat use by the Caucasian subspecies (Garrulus glandarius krynicki) was more evenly spread in summer and autumn but became more concentrated in winter. The analysis used records of 2,153 jays collected from 2002 to 2024 across eight habitat types.

The underlying field records and their basic habitat distribution had already been published in 2025 by the same author. The 2026 paper analysed that material further, using statistical measures of habitat dominance, diversity and year-round consistency, and also compared the Caucasian subspecies with three other Eurasian jay subspecies in Russia.

The new analysis confirmed that winter records were concentrated more strongly in a smaller part of the available habitat spectrum than records from summer and autumn. Windbreaks were especially prominent in winter, while household plots also contributed substantially to the seasonal concentration.

Across the full annual cycle, windbreaks, active orchards and household plots formed the most consistently used habitat core. The author interprets this as evidence of high ecological flexibility in the Caucasian subspecies, particularly in human-modified landscapes where planted tree belts and food-rich sites can provide both cover and feeding opportunities.

Sources and image credit

  1. Kuznetsova, V. V. (2026). Comparative analysis of intraspecific variability and features of biotopic distribution of the Eurasian jay (Garrulus glandarius) in the Russian Federation. University proceedings. Volga region. Natural Sciences, (2), 13–23.Primary 2026 article. It reanalyses the 2002–2024 Stavropol dataset with measures of seasonal habitat dominance, diversity and year-round consistency and compares four Russian Eurasian jay subspecies. The publisher confirms issue No. 2 (2026) and the article was publicly available in August 2026, but the exact release day is not exposed.
  2. Kuznetsova, V. V. (2025). Features of the biotopic distribution of the Caucasian jay (Garrulus glandarius krynicki Kaleniczenko, 1839) in the Stavropol Territory. Bulletin of Tver State University. Series: Biology and Ecology, (2), 60–70.Earlier primary paper using the same 2002–2024 field dataset. It had already reported the basic habitat distribution and seasonal records before the new statistical analysis published in 2026.

Image: Eurasian jay photographed in Yerevan, Armenia, 28 November 2022; Wikimedia Commons categorizes the image as Garrulus glandarius krynicki. Photo: Andrey Gulivanov / Flickr via Wikimedia Commons. CC BY 2.0. Representative Caucasus-region image; not a bird from the Stavropol dataset. · CC BY 2.0 · Source

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