Birds
50 Most Interesting Birds. Birds. Adapted to live on every continent and in every ocean. Mrs. Trotter’s Science Class. Gizzards. Birds don’t chew their food They don’t have teeth, right? Instead they swallow small pebbles, bits of eggshells, and other hard things
Birds
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Presentation Transcript
50 Most Interesting Birds Birds Adapted to live on every continent and in every ocean. Mrs. Trotter’s Science Class
Gizzards • Birds don’t chew their food • They don’t have teeth, right? • Instead they swallow small pebbles, bits of eggshells, and other hard things • It goes into a muscular organ called the gizzard
once in the gizzard, seeds that the bird eats will be ground up into pieces
Endotherms • They maintain a constant body temperature • feathers • as the feathers grow they may fall out • a new feather will grow in its place • oil glands- the bird will use its beak to “preen” itself this mean they use their beak to spread the oil to coat their feathers.
Amniotic Eggs • hard shells • a moist, protective environment for the embryo to develop • The shell is made of calcium carbonate (the same mineral that makes up seashells) • The eggs are fertilized internally before the shell actually forms around it
Fried Eggs Anyone?
Flight • hollow bones • wings • feathers • strong flight muscles • efficient respiratory system • well developed senses, especially eyesight Heard of an Eagle Eye?
Hollow Bones • Most bones are joined to together for more strength and stability • The actually bone itself is hollow and filled with air
Feathers • two main types of feathers • contour- strong lightweight, give a bird its coloring and smooth shape • down – soft fluffy and provide an insulating layer
Wings • Not all birds fly- but most do • Wings provide an upward force called lift for the bird to fly • humans copied this design to make airplanes
Body Systems • Digestive System- needs lots of energy so they eat high energy foods like nuts, seeds, fruit, insects (crop, stomach, gizzard, intestines) • Respiratory System- Air flows in only one direction. The bird gets oxygen while inhaling AND exhaling. This gives them a constant air supply • Circulatory System- Heart, capillaries, arteries and veins circulate the blood very quickly
Importance • They help control pests • pollinate flowers • disperse seeds • pets • food ( meat & eggs) • feathers useful • droppings used as fertilizer Watch
