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50 entries under noun topic. ×

1
Andrewsornis(geohistory, bird, oligocene)
1
Anthropornis(geohistory, bird, oligocene)
1
Archaeospheniscus(geohistory, bird, oligocene)
1
Arthrodytes(geohistory, bird, oligocene)
1
Australlus(geohistory, bird, oligocene)
1
Australotadorna(geohistory, bird, oligocene)
1
Barawertornis(geohistory, bird, oligocene)
1
Bathornis(geohistory, bird, oligocene)
1
Bathornithidae(geohistory, bird, oligocene)
1
Caspiodontornis(geohistory, bird, oligocene)
1
Copepteryx(geohistory, bird, oligocene)
1
Corvitalusoides(geohistory, bird, oligocene)
1
Cruschedula(geohistory, bird, oligocene)
1
Diomedeoididae(geohistory, bird, oligocene)
1
Duntroonornis(geohistory, bird, oligocene)
1
Dynamopterus(geohistory, bird, oligocene)
1
Elaphrocnemus(geohistory, bird, oligocene)
1
Eoanseranas(geohistory, bird, oligocene)
1
Eurotrochilus(geohistory, bird, oligocene)
1
Geranopterus(geohistory, bird, oligocene)
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For more, visit Oligocene_bird on Power Thesaurus
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APASmart Define. (1970). oligocene bird thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/oligocene_bird/thesaurus/narrower
ChicagoSmart Define. 1970. "oligocene bird thesaurus" https://smartdefine.org/oligocene_bird/thesaurus/narrower (accessed October 1, 2026).
HarvardSmart Define 1970, oligocene bird thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/oligocene_bird/thesaurus/narrower>.
MLASmart Define. "oligocene bird thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/oligocene_bird/thesaurus/narrower>