Leaving aside invertebrates, which are often microscopic, the smallest land vertebrate is Paedophryne amauensis. This tiny frog was discovered in the jungles of New Guinea, and adults are only 0.27 inch long.Know More
This type of frog is terrestrial, prowling the leaf litter of the forest floor and eating insects even smaller than itself. Due to the fact that this frog was just discovered in 2009 and first published in 2012, not much is known about this creature yet.
At about 1.14 inches, the smallest mammal on Earth is the bumblebee bat. It is the smallest mammal in the world by length, although the 0.06-ounce Etruscan shrew is slightly lighter.Learn more about Biology
The smallest unit of life is the cell. While there are other building blocks smaller than a cell, such as organelles and quarks, a cell is the smallest structure that functions independently. It can also replicate and perform all the necessary functions of life.Full Answer >
Bacteria are simple organisms that are found in every type of environment, including on land, in the air, in water and on and inside plants and animals. A bacterium (or single bacteria) is a single-celled creature that can take many shapes and forms.Full Answer >
The amniotic egg allows reptiles, birds and mammals to lay eggs on land without drying out. The fluid-filled cavity containing the embryo is separated from the external environment by an amniotic sac that is impermeable to water. It is protected by an external hard shell.Full Answer >
A niche is the role an organism fills within its environment. What and where an animal eats are considered part of its niche. For instance, some birds, such as woodpeckers, eat insects in trees. This limits the bug population and keeps bugs from overtaking the environment.Full Answer >