Home›Mammals›Activity PatternBrowse ByActivity PatternFactsActivity PatternSourcesComments (0)Reader Challenges (0)FactsComparisonReproductive ModeWell-attestedViviparous (Live-Bearing) 1Activity PatternCrepuscularActivity Pattern182 entriesDiurnalActivity Pattern213 entriesNocturnalActivity Pattern272 entriesSources1. Wikipedia: Mammaltier 2WikipediaMammal, lead sectionQuote, Mammal, lead sectionAll modern mammals give birth to live young, except the five species of monotremes, which lay eggs.View 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.