Mammals
Birds
100

This is the largest mammal on Earth.

blue whale

100

This flightless bird is the national bird of New Zealand.

kiwi

200

This mammal is known for its ability to fly.

bat

300

The domestic dog, often referred to as “man's best friend,” belongs to this family.

Canidae

400

This animal is the only marsupial that can glide across distances using a flap of skin.

flying squirrel

500

This mammal has the longest gestation period, lasting up to 660 days.

elephant

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