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59 entries under oligocene topic. ×

1
Elaphrocnemus(noun, geohistory, bird)
1
Eoanseranas(noun, geohistory, bird)
1
Eurotrochilus(noun, geohistory, bird)
1
Geranopterus(noun, geohistory, bird)
1
Goliathia(noun, geohistory, bird)
1
Hoazinavis(noun, geohistory, bird)
1
Hokkaidornis(noun, geohistory, bird)
1
Jamna(noun, geohistory, bird)
1
Kairuku(noun, geohistory, bird)
1
Kairuku grebneffi(expression, geohistory, bird)
1
Korora(noun, geohistory, bird)
1
Manu(noun, geohistory, bird)
1
Palaeeudyptes(noun, geohistory, bird)
1
Palaeeudyptes antarcticus(expression, geohistory, bird)
1
Palaelodus(noun, geohistory, bird)
1
Palaelodus pledgei(expression, geohistory, bird)
1
Palaelodus wilsoni(expression, geohistory, bird)
1
Palaeochenoides(noun, geohistory, bird)
1
Palaeoephippiorhynchus(noun, geohistory, bird)
1
Paracrax(noun, geohistory, bird)
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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>