Measurements of body mass and hematocrit in the Spanish wild griffon vultures (Gyps fulvus) according to age.

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). Data are presented as least squares means ± standard error of the least squares means.n: number of birds analysed.