Mammals include the largest animals on the planet, the rorquals and other large whales, as well as some of the most intelligent, such as elephants, primates, including humans, and cetaceans. The basic body type is a four-legged land-borne animal, but some mammals are adapted for life at sea, in the air, in trees, or on two legs. The largest group of mammals, the placentals, have a placenta, which enables feeding the fetus during gestation. Mammals range in size from the 30–40 mm (1.2–1.6 in) bumblebee bat to the 33-meter (108 ft) blue whale. COUNT 4
QSN1 Which specific mammal is the largest today? ANS1 blue whale QSN2 Which mammal is the smallest? ANS2 bumblebee bat QSN3 Which four legged mammal is considered to be the smartest? ANS3 elephants QSN4 About how small is the average bumble bee bat? ANS4 30–40 mm (1.2–1.6 in)