BIRDS :)

Carinate birds

The group of Carinate birds includes the majority of birds. Most of them can fly.

Ratites birds

The group of ratites includes just a few generally large, flightless birds. Ratites have no keel or flight muscles and their wings are atrophied.

Birds are terrestial vertebrates and most of them can fly.

Characteristics

Aerodynamic Body

Their body is shaped in a way that allows them to move through air.

Feathers

Some are used for flying and others are used to preserve body heat.

Mandibles

Have no teeth and form a beak the shape of which varies depending on the type of fooda particular species of birds eat.

Lungs

Lungs are linked to Little sacks called air sacks these ensure the birds oxygen when it is flying.

Endothermic

This means that they maintain their body temperature regardless of the enviromental temperature

Nutrition

Some birds are carnivores, while some are herbivores.Birds are heterotrophs, this means that they pick up their food from the nature.For example, carnivores eat insects and hervibores eat mostly seeds.

Reproduction.

Birds reproduce sexually and are oviparous. They build their own nests where they lay their eggs, which have an impermeable Shell.