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...ssil-Pictures/Birds/Protopteryx/Protopteryx-fengningensis.htm Rare ancient bird fossil with preserved feathers], Protopteryx fengningensis, from Hebei Prov

..., contains approximately 77 billion bbl of oil equivalent.<ref name=ch03r2>Bird, K. J., 1994, [http://archives.datapages.com/data/specpubs/methodo2/data/a0 ...{{figure number|1}}Ellesmerian(!) petroleum system geographic extent. From Bird.<ref name=ch03r2 />

...Donovan, T., J., 1987, Horizontal-gradient magnetic and helium surveys, in Bird, K., J., Magoon, L., B., eds., Petroleum Geology of the Northern Part of th

* Bird's Head Plate

...oraminifers, brachiopods, sharks) and on land (dinosaurs, pterosaurs, some bird groups, marsupial mammals). However, the pattern of this extinction is stil