Smallest Animals

Animals come in all shapes and sizes, from the really tiny to the breathtakingly huge. While, you may think that being big is better, and it does have many advantages, being small is good too! You need fewer resources to survive, can reproduce more often and can squeeze into all sorts of hiding places to escape predators and hibernate!

Read more about some of the smallest vertebrate animals on earth in our list below.


Pygmy Rabbit

With a typical body length of 9.4–11.4 in (24–29 cm), the tiny Pygmy Rabbit (Brachylagus idahoensis) is the smallest rabbit in the world. Adults weigh only 14 oz (400 g). Found in North America, they generally inhabit areas with deep soil where they can burrow into tall, dense sagebrush for cover and food. Extensive, well-used runways interlace sage thickets and provide travel and escape routes from predators.

Pygmy Marmoset

The Pygmy Marmoset or Dwarf Monkey (Cebuella pygmaea) is the world’s smallest monkey. It is native to the rainforest canopies of Brazil, Columbia, Ecuador, Peru and Bolivia. With a body length, not including the tail, of 5.5–6.3 in (14–16 cm), they really are tiny, and they weigh only 0.5 oz (15 g) at birth.Madame Berthe's Mouse Lemur

While the pygmy marmoset maybe the smallest monkey, the title of smallest known primate goes to the Madame Berthe’s Mouse Lemur (Microcebus berthae). Found in the Kirindy Mitea National Park in Western Madagascar, they have an average body length of 3.6 in (92 mm) and a weight of around 1 oz (30 g).

Etruscan Shrew

The Etruscan shrew (Suncus etruscus), also known as the Etruscan Pygmy Shrew and the White-toothed Pygmy Shrew, weighs only 0.04–0.1 oz  (1.2–2.7 g). That makes it the world’s smallest mammal when measured by weight, but, at 1.4–2 in (36–53 mm), it loses out to the bumblebee bat for smallest in length. Not everything about the Etruscan shrew is small though; its brain is the largest in ratio to its body weight of all animals, larger even than that of a human!

Speckled Padloper Tortoise

The world’s smallest turtle is the Speckled Padloper Tortoise (Homopus signatus) from South Africa. Males measure 2.4–3.1 in (6–8 cm), while females, which are slightly bigger, measure up to almost 4 in (10 cm). The tiny turtles feed on small plants they forage from the rocky outcrops they call home, also using the tiny crevices as hiding places from predators.

Bee Hummingbird

The Bee Hummingbird (Mellisuga helenae) is the smallest bird and the smallest warm-blooded vertebrate. It measures 2.2 in (5.7 cm) in length and weighs 0.06 oz (1.8 g). Its body size is not the only impressive thing about these birds though, as at only 0.8 in (2 cm) wide and 1.1 in (3 cm) deep, their nests are equally tiny!