Model averaging for the BEWR suggested that cavity type was 15 times
stronger at predicting successful nests than vegetation cover, though
both were significant (Table 2; see Table S1 for candidate model
selection), with nests more likely to be successful as vegetation cover
increased (β = 0.06), and if nests were built in an abandoned woodpecker
cavity over a natural cavity (β = 0.95). Model averaging for both the
BCTI and the ATBC suggested that decay and the cavity type were
significant predictors for nest success. As with the GFWO, with every
unit increase in decay, nest success dropped 0.19 for ATBC and 0.41 for
BCTI. Again, cavity type was the strongest predictor; cavity type was 3
times stronger at predicting nest success than decay for the BCTI, and
was 4 times stronger than decay for the ATBC. Across SCB species, cavity
type was the strongest predictor of nest success.