Do apprehended saffron finches know how to survive predators? A careful look at reintroduction candidates

Abstract

Wildlife trafficking is a major factor contributing to the reduction of biological diversity. In Brazil, trafficked animals are apprehended by environmental agencies and released in the wild. The maintenance of wild animals in captivity may jeopardize their survival in the wild, for example, by reducing their ability to recognize a predator. Saffron finches (Sicalis flaveola) are among the most trafficked Brazilian birds. Twenty-eight apprehended saffron finches were submitted to Temperament and Predator-recognition tests, with presentation of predator and non-predator models: a live and a taxidermised hawk, a taxidermised armadillo and a Lego cube. The captive saffron finches have retained general anti-predator responses, such as increasing alertness, avoiding back-facing and keeping distance when presented with potential predators. The birds responded more strongly to the live hawk than to the cube. Although some responses to the other stimuli were not statistically different from each other, a decrease in intensity of response with the decrease in threat level was remarkable. We found no relationship between temperament traits and responses to predators: a possible consequence of husbandry practices in captivity. Our results indicate saffron finches may retain basic anti-predator responses in captivity, which favours release and reintroduction programmes: information relevant for conservation management.

Keywords: Anti-predator behaviour; Reintroduction; Sicalis flaveola; Survival; Temperament.