Temporal factors and distance to human settlement affect nest survival of the endangered Yellow-headed Parrot in Belize, Central America

The endangered Yellow-headed Parrot (Amazona oratrix) has experienced a considerable reduction in abundance and distribution. Identifying natural and anthropogenic causes of nest failure is a critical step towards developing conservation actions that increase nest survival. In this study, we examined daily nest survival in relation to temporal, habitat and anthropogenic factors, as well as nest site properties. We monitored nests (n = 124) across six study sites in Belize during 2017 and 2018 and independently modeled the effects of predation, abandonment and poaching on daily nest survival rates. Overall, the estimated cumulative nest survival probability was 0.18 (95% CI = 0.12 – 0.25). Predation was the main cause of nest failure, followed by abandonment and poaching. Our results showed that nest predation and abandonment usually occurred early in the nesting cycle. Day within the nesting season negatively influenced daily survival for abandoned nests and had a quadratic effect on su...