The amber-embedded fossil includes nearly half of the right side of a hatchling bird and is the most complete specimen discovered so far. The enantiornithes were an ancient group of pre-modern toothed avialans that lived alongside the ancestors of modern birds. But unlike modern birds, the enantiornithes were unlucky: they died out during the Cretaceous–Tertiary (K-T) mass extinction event that killed non-avian dinosaurs roughly 66 million years ago. The micro-CT scans revealed that this is the most complete and finely detailed bird fossil ever found. One researcher even described this fossil bird as a "little brown job" -- a term that is commonly (and sometimes dismissively) used by bird watchers.

Source: Forbes June 10, 2017 17:06 UTC