Birds in a bush: five genes indicate explosive evolution of avian orders.

Abstract excerpt

All recent studies of bird phylogeny have produced poorly resolved relationships among the orders of Neoaves, the lineage that includes most modern birds. This "bush" result suggests the possibility of an explosive and potentially unresolvable evolutionary radiation. However, simultaneous radiations of multiple lineages are thought to be rare or nonexistent in nature and difficult to corroborate empirically...

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• Birds
• Evolution, Molecular
• Genetic Variation
• Likelihood Functions
• Models, Biological