Short-Term Changes in Food Spatial Distribution by Zoo Husbandry Practices Increase Agonism and Affect Feeding Behavior in Chilean Flamingos (Phoenicopterus chilensis): A Case Study.

Abstract

Short-term modifications to animals' enclosures, stemming from zoo husbandry practices, can significantly impact animal behavior and, consequently, their welfare. In this case study, we examined a captive-bred population of 23 adult Chilean flamingos (Phoenicopterus chilensis) during a non-breeding season to evaluate whether short-term alterations in the spatial distribution of feeders would affect the birds' feeding and agonistic behaviors. Initially, we developed an ethogram to establish baseline behavioral data. Subsequently, we assessed individual (latency to approach the feeders) and group (feeding and agonism) responses to feeder changes using an ABA-type experimental design (A1 and A2 feeders at the original location; B feeder location changed). Latency to approach feeders was also correlated with the birds' sex and body weight. The results revealed that during and immediately after the alterations, agonistic behaviors at the most frequently used feeding site by the flamingos increased, while the use of alternative food sources decreased significantly. Latency was not influenced by the birds' sex or body weight. These findings emphasize the importance of closely monitoring even seemingly minor changes in food spatial distribution to prevent negative impacts on the behavior, and presumably, the welfare of flamingos.