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Nutrition and reproduction in birds

Reproduction.

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

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.

What are birds like?

Birds are terrestial vertebrates and most of them can fly.

Characteristics

Endothermic

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

Lungs

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

Mandibles

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

Feathers

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

Aerodynamic Body

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

Types of birds

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.

Carinate birds

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