Premise: Mammal . Mammals include the biggest animals on the planet , the great whales . Mammals range in size from the 30 -- bumblebee bat to the 30 m blue whale . There are around 5450 species of mammal , depending on which authority is cited . Most mammals are polygynous , but some can be monogamous or polyandrous .
Hypothesis: Mammals are creatures.
Label: ENTAILMENT