The known history of birds starts in the late Jurassic. Presumably this ancient bird must have lived earlier than this period. Efforts to unravel earlier phases have failed in providing reliable evidence, since the first Archaeopteryx was found over one hundred years ago. But within the last few years, two sets of fossils have been suggested to substantiate the record of birds before the Late Jurassic: Protoavis (nickname) From the late Triassic of Texas and an ensemble of traces from the Triassic-Jurassic of Africa and North America. Not only do they have a fragmented history of birds, they have fragmented evidence (eg. bones) to support this history.