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The birds are considered new species and now have names given by Fiorillo and his team — “Magnoavipes denaliensis,” incorporating the park’s name for a bird that left especially large tracks, and “Gruipeda vegrandiunis,” roughly translating to “tiny one,” for a bird that left small tracks.
Thousands of prehistoric bird tracks have been found there, but what is particularly important is the variety.
Fiorillo and colleagues from the University of Texas and the University of Alaska Fairbanks calculate that Alaska held about 500,000 hadrosaurs at any given time during that period — roughly equivalent to modern caribou populations in Alaska [SNIP] The methane produced from the hadrosaurs, each of which emitted about 10 times as much of the gas as a modern cow, combined to create a small greenhouse effect and incrementally warm the region, the research speculates.