Table 2. The relationship between the log-transformed prices of traded bird species in Taiwanese pet shops and the predictor variables.

Variables	Estimate	t value	Lambda (λ)	p value
Log number for sale	−0.14 [−0.15, −0.14]	−6.91 [−7.01, −6.77]	0.94 [0.94, 0.95]	< 0.001
Log mass	0.93 [0.89, 0.98]	6.27 [5.83, 6.89]	0.93 [0.92, 0.94]	< 0.001
Log geographic range	−0.18 [−0.2, −0.16]	−2.67 [−2.95, −2.44]	0.96 [0.95, 0.97]	0.008 [0.004, 0.01]
Song attractiveness	−0.09 [−0.1, −0.08]	−2.09 [−2.32, −1.91]	0.97 [0.96, 0.97]	0.03 [0.02, 0.05]
Status (native/alien)	−0.54 [−0.55, −0.52]	−2.5 [−2.7, −2.28]	0.95 [0.95, 0.96]	0.01 [0.007, 0.02]
CITES (listed/not)	0.69 [0.66, 0.72]	3.92 [3.71, 4.09]	0.94 [0.93, 0.95]	<0.001
Realm (Australasia, n = 38)	0.06 [0.04, 0.1]	0.27 [0.16, 0.41]	0.95 [0.95, 0.96]	0.78 [0.67, 0.86]
Realm (Indo-Malay, n = 64)	−0.35 [−0.39, −0.31]	−1.42 [−1.57, −1.23]	0.95 [0.95, 0.96]	0.15 [0.11, 0.21]
Realm (Neotropic, n = 41)	0.4 [0.37, 0.43]	1.2 [1.09, 1.29]	0.95 [0.95, 0.96]	0.23 [0.2, 0.27]
Realm (Palearctic, n = 52)	−0.45 [−0.47, −0.42]	−2.16 [−2.34, −1.95]	0.95 [0.95, 0.96]	0.03 [0.02, 0.05]

The averaged coefficients (median estimates [5^th, 95^th percentiles]) from univariate analysis on the relationship between the log-transformed price of bird species for sale in Taiwanese pet shops (n = 217) and the predictor variables in the first column, were calculated over 100 randomly selected likely phylogenetic trees (see Methods for more details). Parameter Lambda (λ) indicates the strength of phylogenetic signal in the dependent variable (price of birds for sale in Taiwan).