The Value of Vomit (for Rollers)

Vomit is, for the birds, of fearful value, suggests this study: “Rollers smell the fear of nestlings,” D. Parejo, L. Amo, J. Rodríguez and J.M. Avilés, Biology Letters, epub 2012.  The authors, at EEZA, CSIC, Almería, Spain, report: “Some bird species produce chemical compounds when threatened, such as nestlings of the Eurasian roller Coracias garrulus [pictured […]