• Birds meet their needs on land, in water, and in the air.  (McDougal Littell:  pages 173-179)
  
  Vocabulary:
  
  1.  Endotherm:  

  • Definition:  an animal that maintains a constant body temperature.
  • Sentence:  Maintaining body temperature allows endotherms to live in some places where frogs, turtles, and alligators cannot.
  • Characteristics: a cool ectohermic animal's body = a less active animal

  2.  Incubation:
  

  • Definition: the process of keeping eggs warm by bodily heat unitil they hatch.
  • Sentence:  Birds incubate their eggs by sitting on them.
  • Characteristics:  most birds use their body heat to keep eggs warm

  3.  Migrate:

  • Definition:the movement of animals from one region to another in repsonse to changes in the seasons or the environment
  • Sentence:  Unlike plants, animals can respond to seasonal change by changing their location through migration.
  • Characteristics:  Animals migrate by instinct.  They do no have to plan their journey.

  
  Bird species live in most environment (pages 173-174):
  

  • birds are vertebrates
  • there are nearly 10,000 of species of birds
  • there adaptations allow them to live all over the world:
    • some live in a wide range of environments (example:  pigeons)
    • others are limited to living in one place
  • many travel long distances
  • some migrate as the seaons change
  • some cover long distances searching for food
  • characterisitcs of birds:
    • have feathers & beak
    • have four limbs; a pair of scaly legs & pair of wings
    • have eggs with hard shells

  Bird	How They Obtain Food
  Pelican	scoop their foold from the water
  Cardinal	crack ipen seeds & eat the insides
  Swallows	skim insects from a pond's surface
  Hawk	swoops down on smaller prey

  
  Birds can maintain body temperature (page 174):
  
  

  • birds are endotherms (an animal that maintains a constant body temperature
  • mainting temperaterms allows endotherms to live in some places where frogs, and alligators cannot
  • a cool ectothermic body = an animal that slows down and becomes less active
  • less active animal:
    • consumes little or no food
    • unlikely to reproduce
    • moves slowly or becomes idle
    • breathes less
    • nervous system = less repsonsive
    • heart pumps slowly
    • digestive system slower
  • if an ectothermic animal stays cool for too long it will die

  
  updated: 11/29 at 12:50 pm