Infectious disease. Bird advocates fear that West Nile virus could silence the spring.
Malakoff
David
D
D025041:Animal Migration; D000818:Animals; D001715:Bird Diseases / Q000453:epidemiology* / Q000401:mortality / Q000635:transmission; D001717:Birds; D017691:Caribbean Region / Q000453:epidemiology; D006801:Humans; D014481:United States / Q000453:epidemiology; D014901:West Nile Fever / Q000453:epidemiology / Q000401:mortality / Q000635:transmission / Q000662:veterinary*