West Nile virus is a single-stranded RNA virus in Flaviviridae. It spreads via mosquitoes and can cause fever, flu-like illness, or severe neurological disease in rare cases.
A long-running study of carrion crows uses tiny microphones and artificial intelligence to decode their complex vocalizations, revealing thousands of hours of calls from birds and brood parasites. The researchers say the work advances understanding of crow communication and behavior.