Birds

Mere som dette

Animal systems

af Virina Maged Atia Malty

Animal Reproduction

af Cheng Hong Jiun

Vital functions in plants

af Iván Ortega

Evolution: Natural Selection

af Karissa Nicholson

Birds

Subgrups

Can't fly

Can fly

nutriction

Their foot depens of the form of their beak

They can be carnivorous or herbivorous

perts of the body

They have a beak

They are covered by feathers

They have four limbs

Respiration

Their lungs are more complex than the reptiles but less than the mammals lungs

They breathe through lungs

Reproduction

They are oviparous