AIV infection |
Categorical, outcome variable |
Positive suggests current infection based on RRT-PCR |
Binomial outcome–positive or negative |
Sex |
Categorical, explanatory |
Gender of bird |
Female or Male |
Age |
Categorical, explanatory |
Age of bird at capture |
Hatch year (<1 year old, HY and SY) or after hatch year (>1 year old, AHY and ASY) |
Year |
Categorical, explanatory |
Year of sampling |
2007–2010 |
Flyway |
Categorical, explanatory |
Migratory flyway where sampling occurred [19] |
Atlantic, Mississippi, Central, or Pacific |
Latitude |
Continuous, explanatory |
Latitude of sampling location |
Decimal degrees, standardized |
Blue-winged teal stage of annual life cycle–“Season” |
Categorical, explanatory |
Stage of life cycle of BWTE [18] |
July-August: Staging, End of Moult, Preparation for fall migration; Sept-Oct: Fall migration; Nov-June: Wintering, Spring migration, breeding period |