Thin-toed footprints pressed into a sandy riverbank more than 100 million years ago are the continent's oldest known bird tracks.
via Discovery News http://news.discovery.com/animals/australias-oldest-bird-footprints-discovered-131028.htm#mkcpgn=rssnws1
via Discovery News http://news.discovery.com/animals/australias-oldest-bird-footprints-discovered-131028.htm#mkcpgn=rssnws1
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