According to the habitat where they live, animals can be classified into:
- Aquatic : They live in the water. Some breathe underwater while others, like cetaceans, need to climb to the surface to take oxygen.
- Terrestrial : They move around the land, they do not have the capacity to fly and they can not live permanently in the water, even if they can swim.
- Aerial-terrestrial : They are what have the ability to fly. However, they also depend on the terrestrial environment to reproduce. It is usually about birds and insects.
Examples of aerial-terrestrial animals
- Eagle : Bird of prey, that is to say that it is hunter ( predator ).
- Peregrine falcon : Bird of fine halas that can reach great speeds on the fly. It is bluish in color with a lower whitish area and dark spots. The head is black. Live in almost the entire planet. It hunts birds on the fly, but also mammals, reptiles and insects, so it depends on the ground for hunting.
- Country Goose : Live in Europe and Asia. It feeds on grass, cereals and roots. At the moment of reproduction, it forms its nests on the ground.
- Dragonfly : It is a paleopterous, that is to say, an insect that can not fold the wings on the abdomen. Their wings are strong and transparent. It has multifaceted eyes and a lengthened abdomen.
- Fly : Diptera insect. Although as adults they can fly, when they leave the egg they go through a larval period in which they are purely terrestrial animals, until the metamorphosis is finished .
- Bee : Hymenoptera insects, meaning they have membranous wings. These flying organisms have a great impact on terrestrial life, as they are responsible for pollinating flowering plants.
- Bat : They are the only mammals with the ability to fly. Like bees, they fulfill a pollinating function of flowering plants and also seed dispersal, to the point that some plant species depend totally on bats for their reproduction.
- Hummingbird : Birds native to the American continent. They are among the smallest pájen in the world.
- Toucan : Bird of very developed peak and intense colors. It can reach up to 65 cm. They are distributed in wooded areas, from humid forests to temperate forests.
- Common Sparrow : Sparrows, is best known to the inhabitants of cities because they also adapt to urban spaces. It inhabits all continents with the exception of Antarctica.