Table A1.

Model selection and explanatory variables composing the 10 models put in competition by AICc for modeling the number of visits by ruby-throated hummingbird competitors in Cleveland County, Quebec (Canada), 2007–2009. Variables included and omitted from a model are indicated by a cross and a circle, respectively. The same set of models was used for the three sex combinations. Feeder rank is based on the sex of competitors. Akaike weights (w_i) represent the probability that a particular model best describes the data. The response variable was log-transformed and modeled with linear mixed-effect models with feeder ID and the intercept and slope of spatial concentration for focal individual ID as random effects.

Variables	1	2	3	4	5	6	7	8	9	10
Year	x	x	x	x	x	x	x	x	x	x
Grid usage	x	x	x	x	x	x	x	x	x	x
nb of competitors	x	x	x	x	x	x	x	x	x	x
Feeder rank	x	x	x	x	x	x	x	x	x	x
Nectar sucrose concentration	x	x	x	x	x	x	x	x	x	x
Spatial concentration	o	o	x	x	x	x	x	x	x	x
Daily nb of visits	o	o	x	o	x	x	x	x	x	x
Spatial stability	o	o	x	x	o	x	x	x	x	x
Openness	o	x	x	x	x	x	o	x	x	x
Lateral visibility	o	x	x	x	x	x	o	x	x	x
Spatial concentration:daily nb of visits	o	o	o	o	x	x	x	x	x	x
Spatial concentration:nb of competitors	o	o	o	x	x	o	x	x	x	x
Spatial concentration:spatial stability	o	o	o	x	o	x	x	x	x	x
Spatial concentration:openness:lateral visibility	o	o	o	x	x	x	o	o	x	x
Spatial concentration:feeder concentration	o	o	o	o	o	o	o	o	o	x
Males versus females competitors
ΔAICc	53.96	50.92	5.44	13.37	1.15	2.34	3.07	0.00	3.31	5.13
wi	0.00	0.00	0.03	0.00	0.23	0.13	0.09	0.41	0.08	0.03
Females versus females competitors
ΔAICc	263.46	253.05	9.00	0.80	6.71	5.00	8.18	0.44	0.75	0.00
wi	0.00	0.00	0.00	0.20	0.01	0.03	0.01	0.24	0.21	0.30
Females versus males competitors
ΔAICc	45.36	41.08	11.34	9.66	3.92	6.86	3.69	0.00	3.20	4.85
wi	0.00	0.00	0.00	0.01	0.09	0.02	0.10	0.61	0.12	0.05