Percentage of Salmonella-positive wild griffon vultures from different ages.

The age of the animals was determined according to the plumage characteristics and the colour of the bill and eye (juvenile, less than 2 years; subadult, between 2 to 5 years; adult, more than 5 years).n: number of birds analysed.受试鸟类的年龄通过羽毛特征、喙部与眼部的颜色进行判定：幼鸟（年龄小于2年）、亚成体（年龄介于2至5年之间）、成体（年龄大于5年）。n为本次分析的鸟类数量。