Correlates of extinction risk in Chinese endemic birds

Table 1 Results of one- and two-predictor regressions of independent contrasts for predicting extinction risk in Chinese endemic birds

Variable	Univariate PGLS		Bivariate PGLS with range size
Variable	Slope	t	Slope	t
Body size	1.086	2.469*	1.067	2.405*
Clutch size	− 0.167	− 2.239*	− 0.176	− 2.338*
Trophic level	0.050	0.508	0.049	0.496
Dispersal ratio	− 0.045	− 1.284	− 0.045	− 1.303
Nest type	0.203	0.506	–	–
Nest site	0.068	0.359	0.264	1.634
Habitat specificity	− 0.089	− 1.088	− 0.155	− 1.639
Geographic range size	− 0.402	3.494***	–	–
Flocking	0.068	0.249	0.034	0.122
Migrant	− 0.204	− 0.678	− 0.259	− 0.837
Hunting vulnerability	0.475	3.498***	0.469	3.409**
Human population density	0.001	2.597*	0.003	3.766***
Temperature	− 0.013	− 0.753	− 0.012	− 0.436
NDVI	− 1.160	− 1.203	− 4.42 × 10⁻⁵	− 0.314
Elevation	6.94 × 10⁻⁵	0.626	1.325	1.045

ISSN: 2053-7166