Table A6.

Cox proportional hazards models for latency to arrive at tables

Variable	Full model			Minimal model
rho	χ2	P	rho	χ2	P
Date	−0.014	0.073	0.787
Noncorv_before	−0.106	3.659	0.058
Year	−0.094	3.284	0.070
Condition*Species group
Litter*Corvid	−0.061	0.947	0.330
Natural*Corvid	−0.066	1.682	0.195
Novel*Corvid	−0.021	0.084	0.771
Condition
Litter	0.026	0.172	0.679	0.065	0.817	0.366
Natural	−0.112	5.889	0.015	−0.167	9.891	0.002
Novel	0.029	0.157	0.692	0.028	0.143	0.705
Corvid	0.214	9.477	0.002	0.192	12.546	<0.001
Urban	−0.048	0.544	0.461	−0.085	2.085	0.149
Cornwall	0.103	4.346	0.037	0.116	5.412	0.020
Corv_before	0.176	8.068	0.005	0.256	16.900	<0.001
Time	−0.195	12.357	<0.001	−0.168	7.607	0.006
Condition*Habitat
Litter*Urban	−0.215	16.422	<0.001	−0.243	21.609	<0.001
Natural*Urban	0.068	2.158	0.142	0.045	0.703	0.402
Novel*Urban	−0.067	1.070	0.301	−0.055	0.637	0.425

Noncorv_before is a measure of whether a noncorvid species arrived before the current observation. Corv_before denotes whether a corvid species had arrived beforehand. Significant P values (P < 0.05) are highlighted in bold. The control condition was the reference category for all object conditions, rural areas for the urban gradient and Cambridgeshire for the region.