Table 4 Model selection results based on logistic regression of factors influencing American three-toed woodpecker use of trees within foraging patches compared to paired trees at the Hayman Fire (2003 to 2004), Colorado, USA. Year was included in all logit models. Models are listed with the best-fitting model first and sorted by ΔAIC c . AIC c weights (w i ), indicate the relative likelihood of each model.
Model (n = 96) | K | AIC c | ΔAIC c | w i |
|---|---|---|---|---|
Year + dbh | 3 | 115.50 | 0.00 | 0.34 |
Year + dbh + Beetles | 4 | 115.67 | 0.16 | 0.32 |
Year + dbh + Beetlesa + TBI | 5 | 116.36 | 0.86 | 0.22 |
Year + dbh + TBI | 4 | 117.66 | 2.16 | 0.12 |
Constant | 1 | 135.12 | 19.62 | 0.00 |
Year + Beetles + TBI | 4 | 136.37 | 20.87 | 0.00 |
Year + Beetles | 3 | 137.12 | 21.61 | 0.00 |
Year | 2 | 137.21 | 21.70 | 0.00 |
Year + TBI | 3 | 138.95 | 23.44 | 0.00 |