Feather plucking in captive Aratinga auricapillus: influence of sex, stress, and temperament

Abstract Brazil is recognized for its biological megadiversity, particularly noted for the variety of psittacines (Order Psittaciformes). Among them is Aratinga auricapillus, a species in decline in the wild and involved in illegal trafficking, frequently found in Centros de Triagem de Animais Silvestres (CETAS) [trans. Wildlife Screening Centers]. Feather plucking is a psychogenic behavior directly related to stress that affects captive birds. This study aimed to evaluate the influence of sex, stress level, and temperament on psychogenic feather plucking in A. auricapillus captive in Bahia, Brazil. Two groups were formed: the Control Group, consisting of five healthy individuals, and the Test Group, with five individuals exhibiting feather plucking. Analyses included clinical evaluation, plumage analysis, molecular sexing, pathogen investigation, leukogram, and an open field test. The heterophil:lymphocyte ratio was used to determine the stress level. Temperament was assessed through the open field test, classifying the animals as either shy or bold. Data analysis indicated a statistically significant association (p = 0.04) of sex with feather plucking, with females being more affected. These findings are valuable for deepening the understanding of the factors influencing feather plucking in A. auricapillus. Understanding this behavior is essential for developing management and conservation strategies for these birds in captivity.