Model selection results based on Cox proportional-hazard models of hazard of loss in relation to nest characteristics (model 1), nest tree characteristics (models 2–4) and nest-occupancy variables (model 5–6) for the 157 nesting-platforms in the Special Protection Area “Sierras de Burete, Lavia y C

aNESTH: nest height; TREEH: height of the nest-tree; DBH: nest tree diameter; NTCC: crown cover of the nest tree; SP: type of nest building forest raptor species; FREUSE: frequency of use of the nest. Variables are described in Table 1.
bThe hazard ratio is equal to exp (estimated coefficient) and represents the change in hazard per unit compared to a baseline hazard rate. A hazard ratio of 1 indicates no change in hazard, a hazard ratio above 1 indicates an increase in hazard (shorter lifespan), and below 1 indicates a decrease (longer lifespan).
cThe builder species booted eagle was considered as the “control” with which the other two builder species were compared.