A First Record of Organochlorine Pesticides in Barn Owls (Tyto alba) from Portugal: Assessing Trends from Variation in Feather and Liver Concentrations - Roque, Inês; Lourenço, Rui; Marques, Ana; Martínez-López, Pilar; Espín, Silvia; Gómez-Ramirez, Pilar; García-Fernández, Antonio Juan; Roulin, Alexandre; Rabaça, João E. (2022)