The strange new species is the first known nonavian dinosaur that could both run and swim, researchers say. (sciencenews.org)
The Jehol birds faced competition with pterosaurs, and occupied sympatric habitats with nonavian theropods, some of which consumed birds. (sciencedaily.com)
It seemed so obvious that if fairly small changes in development, which adjusted the timing and concentrations of growth and signaling factors, could have led to the evolution of birds from nonavian dinosaurs, we could readjust those changes in development and get a dinosaur from a chick embryo. (discovermagazine.com)