Main effects of hummingbird age and molt status on the anti-microbial activity of whole blood against S. aureus.

The average microbial growth, as a percent change, of S. aureus following exposure to the whole blood of Anna’s Hummingbirds is shown. A negative value indicates a decrease in microbial growth. The P-values associated with the main effects of age, sex, molt and the interaction of age with molt are shown.