Home›Bird Orders›Era First AppearedBrowse ByEra First AppearedFactsEra First AppearedSourcesComments (0)Reader Challenges (0)FactsComparisonTaxonomic Rank OrderWell-attested5 1Era First AppearedCretaceousEra First Appeared9 entriesPaleogeneEra First Appeared21 entriesNeogeneEra First Appeared6 entriesSources1. Wikipedia: Taxonomic ranktier 2WikipediaTaxonomic rank, Fundamental ranks section, rank sequence sentence, bird ordersQuote, Taxonomic rank, Fundamental ranks section, rank sequence sentence, bird orderskingdom, phylum or division, class, order, family, genus, and speciesView the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.