an important factor influencing survival was sex, with males showing a higher survival rate than females.
male had lower BMR than females,but as we found no evidence in survival rate was probably not attributed to differences in BMR per se. However, we can't rule out sexual differences in regulation of metabolism and/ or antioxidant protection as a potential explanation, as this has previously been observed in the zebra finch. Anyway, longer lifespans among males is often observed in passerine birds and our results hence support these observations.