Home›Bird Families›Era First AppearedBrowse ByEra First AppearedFactsEra First AppearedSourcesComments (0)Reader Challenges (0)FactsComparisonTaxonomic Rank OrderWell-attested6 1Era First AppearedCretaceousEra First Appeared1 entryPaleogeneEra First Appeared24 entriesNeogeneEra First Appeared19 entriesQuaternaryEra First Appeared39 entriesSources1. Wikipedia: Taxonomic ranktier 2WikipediaTaxonomic rank, Fundamental ranks section, rank sequence sentence, bird familiesQuote, Taxonomic rank, Fundamental ranks section, rank sequence sentence, bird familieskingdom, 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.