The Sibley-Munroe checklist was a landmark document in the study of birds. It drew on extensive DNA-DNA hybridisation studies to reassess the relationships between modern birds.
... 65 years of age or older. The median age is 28 years. For every 100 females there are 82.8 males. For every 100 females age 18 and over, there are 78.8 males.
Th ...