Sex ratio (male to female) of Andean condors in different regions within the distribution range of the species.

Data on sexes is separated by age-class (adult vs. immature, the latter including juveniles and subadults). Surveys included in this table were made by field observations of birds roosting in communal roosts [17] (and this study), performing foraging flights [23], or feeding at carcasses [11] and [22], and molecular sexing of moulted feathers collected at communal roosts [24]. We included data on the maximum number of individuals (Maximum) and the total number of individuals counted in a survey (Total; see methods for more details).1Condor behaviour at the time of survey (i.e. foraging, feeding, or roosting).AM/AF = Adult male to adult female; IM/IF = Immature male to immature female; JM/JF = Juvenile male to juvenile female; J = Juvenile; SA = Subadult;P = significance; ns = no significant, *≤0.05, **≤0.001 (Binomial test).