Blowfly Trypocalliphora braueri larvae infestation in Willow Warbler Phylloscopus trochilus nestlings on the Kola Peninsula, Russia

Authors

  • Maria Matantseva Institute of Biology, Karelian Research Centre, Russian Academy of Sciences (IB KarRC RAS) https://orcid.org/0000-0002-5393-4144
  • Sergey Simonov Institute of Biology, Karelian Research Centre, Russian Academy of Sciences https://orcid.org/0000-0001-6396-9335
  • Sofya Eremeeva Institute of Biology, Ecology and Agricultural Technologies, Petrozavodsk State University

DOI:

https://doi.org/10.34080/os.v35.26570

Keywords:

birds, breeding, subcutaneous parasite, nestling survival, wildlife disease

Abstract

The blowfly Trypocalliphora braueri is a subcutaneous parasite infesting nestlings. We investigated the occurrence of blowfly larvae in Willow Warbler Phylloscopus trochilus nestlings on the Kola Peninsula, Russia, in 2023–2024. The infestation rate was 46.9% of nests and 37.9% of chicks. The highest infestation rates were observed during a season with a late beginning of bird breeding and an unusually warm summer. In the infested nests, 86.2% (28.6–100%) of nestlings contained 1–11 larvae. Chicks with many larvae or with vital organ damage died. Nestling survival in the infested nests decreased by 15.4% compared to that in uninfected nests, but these differences were not statistically significant. We also found no significant differences in infestation rates between areas with varying levels of anthropogenic pressure.

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Author Biographies

Maria Matantseva, Institute of Biology, Karelian Research Centre, Russian Academy of Sciences (IB KarRC RAS)

PhD, Senior Researcher Laboratory for Zoology, Institute of Biology, Karelian Research Centre, Russian Academy of Sciences (Petrozavodsk, Russia)

Sergey Simonov, Institute of Biology, Karelian Research Centre, Russian Academy of Sciences

PhD, Senior Researcher Laboratory for Zoology, Institute of Biology, Karelian Research Centre, Russian Academy of Sciences (Petrozavodsk, Russia)

References

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Published

2025-03-18

How to Cite

Matantseva, M., Simonov, S., & Eremeeva, S. (2025). Blowfly Trypocalliphora braueri larvae infestation in Willow Warbler Phylloscopus trochilus nestlings on the Kola Peninsula, Russia. Ornis Svecica, 35, 17–25. https://doi.org/10.34080/os.v35.26570

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Section

Short Communications