Bird Brains

这是一篇关于Bird Brains的思维导图，主要内容有leading in、problem posing、examples of bird's intelligence、reasons for bird's intelligence、ending。

Bird Brains

• leading in
  • Carrion crows crack walnuts open with the help of human cars.
  • Eagles carry tortoises up to a great height and dropm them on to the rocks .
• problem posing
  • whether wild creatures , including birds , show genuine intelligence
• examples of bird's intelligence
  • power to recall
    • eg : The Clarke's nutcracker retrieve over pine seeds buried in deep snow .
  • capability of tool-making and tool-using
    • eg : Crows make rakes or combs from their stiff leathery leaves .
    • eg : Woodpecker snaps off a twig , term it to size and use it to pray insects out of bark .
  • ability to engage in complex meaningful communication
    • eg : Alex's extrodinary ability as a parrot .
    • eg : Birds like New Zealand saddlrbacks can understand , speak another bird's language .
  • A pigeon can hold concepts and ideas .
  • Keas rip windscreen wipers , ring bell and drop rocks on roofs .
  • Jack the jackdaw squawked down phones .
• reasons for bird's intelligence
  • social neccessity
    • Ravens cooperate to get carcass .
• ending
  • The level of intelligence among birds vary but no living bird is truly stupid .