Peer-Reviewed Publication
Environ Res2026;125621.September 6, 2026Journal Article

Veterinary insecticides in wild bird nests: emerging contaminants in urban and protected forest habitats.

Zsófia Varga-Szilay1, Olivér Csíkvári2, Olga Ulbert3, Ivett Pipoly4, Gábor Seress5
1HUN-REN-PE Evolutionary Ecology Research Group, University of Pannonia, H-8200 Veszprém, Hungary. Electronic address: zsofia@vargaszilay.hu.
2Charles River Laboratories Hungary, H-1117 Budapest, Hungary. Electronic address: oliver.csikvari@crl.com.
3Analytical Chemistry Research Group, Center for Natural Sciences, H-8200 University of Pannonia, Veszprém, Hungary. Electronic address: ulbert.olga@mk.uni-pannon.hu.
4HUN-REN-PE Evolutionary Ecology Research Group, University of Pannonia, H-8200 Veszprém, Hungary; Behavioral Ecology Research Group, Center for Natural Sciences, H-8200 University of Pannonia, Veszprém, Hungary. Electronic address: pipoly.ivett@gmail.com.
5HUN-REN-PE Evolutionary Ecology Research Group, University of Pannonia, H-8200 Veszprém, Hungary; Behavioral Ecology Research Group, Center for Natural Sciences, H-8200 University of Pannonia, Veszprém, Hungary. Electronic address: seress.gabor.laszlo@mk.uni-pannon.hu.

Abstract

Veterinary ectoparasiticides widely used on companion animals often contain synthetic insecticides whose agricultural applications have been restricted in the European Union because of environmental concerns. These neurotoxic compounds can persist on animal fur and enter surrounding environments, potentially exposing non-target organisms. The Great Tit (Parus major), a common passerine in both urb…

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