Comparative Sublethal Toxicity of Three Neonicotinoid Insecticides in Red-Winged Blackbirds (Dataset)

This dataset contains physiological and behavioural measurements collected from 121 wild-caught red-winged blackbirds (_Agelaius phoeniceus_) during a controlled laboratory experiment evaluating sublethal toxicity effects of three neonicotinoid insecticides: imidacloprid, clothianidin, and thiamethoxam. Birds were dosed orally with low, high, or control levels of each compound, or assigned to a food restriction group for comparison. The dataset includes body mass, food intake, plasma metabolite concentrations (triglycerides, β-hydroxybutyrate, uric acid), and neurotoxicity scores measured at 1, 6, and 24 hours post-dosing. Additional data cover morphometrics (tarsus and wing length), fattening indices, and the time until first observed signs of toxicity. Each record is associated with a treatment group and includes sex, dosing level, and survival outcome. The study was conducted between May and June 2018 at the Facility for Applied Avian Research in Saskatoon, Saskatchewan, and supports the findings published in Environmental Science & Technology doi:10.1021/acs.est.5c03152). This dataset supports ecotoxicological research on pesticide exposure in wild birds, sublethal physiological effects, and comparative toxicity among neonicotinoids.