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Table 2 Factors associated with body condition (mass after accounting for size) for (a) red-winged fairy-wrens and (b) white-browed scrubwrens captured during the spring and summer months (October–March) between 1977 and 2014

From: Associations between changing climate and body condition over decades in two southern hemisphere passerine birds

Model

Intercept

AnnNColdDays

Julian day

Age

NHotDryDays

Rain30D

Body size

Time of day

TmaxDB4

Sex (male)

df

AICc

Delta

Weight

(a) Red-Winged Fairy-Wren

 1

9.576 ± 0.028

0.024 ± 0.016

−0.053 ± 0.021

0.029 ± 0.017

− 0.043 ± 0.017

0.098 ± 0.022

0.090 ± 0.021

0.176 ± 0.018

0.097 ± 0.020

0.517 ± 0.041

13

2112.510

0.000

0.249

 2

9.575

NA

− 0.051

0.031

− 0.043

0.103

0.089

0.176

0.097

+

12

2112.606

0.096

0.238

 3

9.573

0.026

−0.057

NA

− 0.045

0.096

0.096

0.175

0.098

+

12

2113.346

0.836

0.164

 4

9.572

NA

−0.055

NA

−0.044

0.100

0.096

0.175

0.098

+

11

2113.804

1.295

0.131

(b) White-browed scrubwren

 1

10.943

NA

NA

NA

NA

NA

0.085 ± 0.034

0.130 ± 0.025

NA

0.751 ± 0.077

7

1175.632

0.000

0.064

 2

10.943

NA

NA

NA

NA

NA

0.088

0.135

0.034

+

8

1175.745

0.112

0.060

 3

10.943

NA

−0.032

NA

NA

NA

0.090

0.137

0.050

+

9

1176.411

0.778

0.043

 4

10.950

NA

NA

−0.031

NA

NA

0.099

0.129

NA

+

8

1176.538

0.906

0.040

 5

10.943

NA

NA

NA

NA

0.029

0.089

0.136

0.049

+

9

1176.631

0.999

0.039

 6

10.950

NA

NA

−0.029

NA

NA

0.101

0.135

0.033

+

9

1176.794

1.161

0.036

 7

10.951

NA

−0.036

−0.033

NA

NA

0.105

0.136

0.050

+

10

1177.128

1.495

0.030

 8

10.942

NA

NA

NA

0.016

NA

0.084

0.132

NA

+

8

1177.128

1.496

0.030

 9

10.945

−0.012

NA

NA

NA

NA

0.087

0.128

NA

+

8

1177.467

1.835

0.025

 10

10.945

−0.014

NA

NA

NA

NA

0.090

0.134

0.035

+

9

1177.509

1.876

0.025

 11

10.943

NA

−0.009

NA

NA

NA

0.085

0.130

NA

+

8

1177.556

1.923

0.024

 12

10.943

NA

NA

NA

NA

0.006

0.085

0.129

NA

+

8

1177.623

1.991

0.023

 13

10.943

NA

NA

NA

0.010

NA

0.087

0.136

0.031

+

9

1177.624

1.992

0.023

  1. Shown are standardized coefficients and their standard errors (s.e.) for variables included in the top models with ∆AICc less than 2, following model selection based on AICc. All variables were standardised and climatic variables identified as important in the best model have 95% CIs of estimated coefficients that do not overlap zero and are shown in bold. Models were ranked by ∆AICc values. NA represents variables that were not included in the model