Table 2. Influence of landscape configuration on the homing time of translocated territorial, mated male Red-breasted Nuthatches, Golden-crowned Kinglets, and Yellow-rumped Warblers (reference category) determined by Cox regression (G = 18.9, df = 8, P = 0.02, R2 = 0.36; n = 42; seven individuals per treatment per species; eight censored cases). All tests are two-tailed except for treatment and treatment x time, where birds translocated along potential barriers serve as the reference category.

Variable
df
b
1 SE
G
P
Translocation distance,
    ln-transformed (m)
1
-1.29
0.83
2.4
0.12






Forest covera (%)
1
0.00
0.02
0.0
0.99






Treatment
1
-2.02
0.74
8.1
0.002






Speciesb
2
 
 
14.2
< 0.001
       Kinglet
1
-1.42
0.61
5.4
0.02
       Nuthatch
1
-2.97
0.90
14.1
<0.001






Treatment x Time
1
-0.01
0.01
0.3
0.71






Treatment x Speciesb
2
 
 
9.8
0.007
       Across and kinglet
1
2.27
0.88
6.9
0.009
       Across and nuthatch
1
3.11
1.15
8.1
0.004

a Forest cover was estimated in 5-m grid cells along the capture-to-release line as well as in the grid cells contained in rectangles radiating 400 m from both the line and from its start and end points.

b The influence of species and of the interaction between treatment and species, which are both determined by dummy variables, were tested as a whole (by comparing the deviance of the reduced model to the deviance of the full model) before testing the specific effect of their inherent variables. Note that the Yellow-rumped Warbler and the “along barrier” treatment served as reference categories. It follows, for instance, that “across and kinglet” refers to the influence of the bird being a kinglet translocated across the barriers as compared to a warbler translocated along the barriers.