{"fact":"Crows can transmit West Nile virus through their feces.  Fecal staining and subsequent preening behavior in crow roosts can lead to infection.","context":"Direct WNV transmission between crows has been demonstrated in the laboratory, infected crows can shed the virus from the oral cavity, and their feces can have high titers of WNV. Field studies have reported that crows within a communal roost are frequently stained with feces of other crows and they exhibit preening behavior that could subject them to oral infection.","source":"Diego Montecino-Latorre; Christopher M. Barker, Overwintering of West Nile virus in a bird community with a communal crow roost, 10.1038/s41598-018-24133-4","index":537}