Smallest bird - The bee hummingbird
This tiny bird is from Cuba. It has a length of barely 6 cm when fully-
Smallest mammal – The Kitti’s hog-
This tiny animal is found only in Thailand and due to its small size is also known as the bumblebee bat. When fully-
Smallest predator – The Etruscan shrew
This little animal is also known as Savi’s white-
Smallest dog – The Chihuahua
The Chihuahua is generally recognised as the smallest breed of dog. At just under 5-
Super small babies – The kangaroo
Kangaroos have very short pregnancies and deliver tiny furless babies. These babies, known as Joeys, crawl into their mother’s pouch when only a month old. Some Joeys are so small they could fit on a teaspoon.
Smallest spider – The patu digua
This tiny spider is no bigger than the full stop at the end of this sentence. It was discovered in the forests of Borneo -
Smallest primate – The pygmy mouse lemur
Discovered in the tropical forests of Madagascar, this tiny lemur grows to about 6-
Why aren’t insects bigger?
Answer : Whereas humans have lungs, insects breathe using a vast connection of tiny tubes. These tubes deliver oxygen directly to their tissues. However the bigger insects get, the less efficient this method of breathing becomes. Interestingly, thousands of years ago when the atmosphere had more oxygen in it, insects used to be much, much bigger. Indeed millipedes three feet long would not have been uncommon.