Birds



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Bird Taxonomy · Kingdom: Animalia o Phylum: Chordata § Subphylum: Vertebrata · Class: Aves Body Structure: · Feathers · Wings · Beak · Thin hollow bones Body functions: · Lungs · Air sacs o Unidirectional air flow · 4-chambered heart · Warm blooded(Endothermic) · Keen eyesight Reproduction: · Internal fertilization · External amniotic egg development · Hatchlings o Altricial § No feathers § Dependant of adults o Precocial § Fully feathered § Follow mothers Digestion: · Large diet variety o Seeds o Nectar o Insects o Small animals o Carrion · Beaks are a diet indicator Feathers: · Flight o For flying · Contour o Covers bird body · Down o Used for insulation Flight adaptations: · Feathers · No teeth · Hollow bones · Sternum o Powerful flight muscles · Plenty of energy o 1000 heartbeats per minute · Unidirectional air flow