The fossils, which are between two and three centimeters long, were discovered by scientists in Myanmar for the first time. The wings preserved traces of color and little sharp claws, which allowed their owners to climb trees. When the researchers analyzed the fossil, they found claw scratches, which could possibly mean that the creatures attempted to escape from the sticky sap.
"The fact that the tiny birds were clambering about in the trees suggests that they had advanced development, meaning they were ready for action as soon as they hatched," explained the study's lead author Dr. Lida Xing from the China University of Geosciences, who made the discovery
Co-author Prof. Mike Benton from the University of Bristol said: "The individual feathers show every filament and whisker, whether they are flight feathers or down feathers, and there are even traces of color — spots and stripes."