Why is evolution hiding?

[Angrboda]

Why would the bird continue for millions of generations to improve a wing stub that is at their detriment? A bird with a useless wing is at a severe disadvantage. Natural selection shouldn't do that. Why would a bird evolve to fly?

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Claim CB921.2:
What use is half a wing? A leg evolving into a wing would be a bad leg long before it was a good wing.

Source:
Brown, Walt, 1995. In the beginning: Compelling evidence for creation and the Flood. Phoenix, AZ: Center for Scientific Creation, p. 7. http://www.creationscience.com/

Half a wing can have any of several uses:

• In insects, half a wing is useful for skimming rapidly across the surface of water (Marden and Kramer 1995; Kramer and Marden 1997; Thomas et al. 2000).
  
• In larger animals, half a wing is useful for gliding. Airfoils for gliding appear in several different forms in many different animals, including
  
  • skin between legs on flying squirrels (Petauristinae), scaly-tailed squirrels (Anomaluridae), flying phalangers, and flying lemurs
    
  • flattened body of the flying snake (Chrysopelea)
    
  • large webbed feet on gliding tree frogs (Rhacophorus and Polypedates)
    
  • fins on flying fish (Exocoetidae) and flying squid (Onychoteuthis)
    
  • expanded lateral membranes supported by elongated flexible ribs on gliding lizards (e.g., Draco)
    
  • expanded lateral membranes supported by elongated jointed ribs on the Kuehneosauridae from the late Triassic
    
  • lateral membrane supported by bones separate from the rest of the skeleton on Coelurosauravus jaekeli, an Upper Permian flying reptile (Frey et al. 1997)
    
  • even an ant (Cephalotes atratus), when it falls, uses its hind legs to direct its aerial descent back to its home tree's trunk (Yanoviak et al. 2005).
• In immature chickens, wing-flapping enhances hindlimb traction, allowing the chickens to ascend steeper inclines. This function could be an intermediate to the original flight of birds. (Dial 2003)
  
• In some flightless birds (e.g., penguins), wings are used for swimming.
  
• In some flightless birds, wings are probably used for startling potential predators.
  
• Black herons use their wings to shade the water in which they fish.
  
• Some owls use their wings to hold their prey against the ground.
  
• Nighthawks, woodcocks, riflebirds, and several species of manakins make noises with their wings as part of sexual displays.
  
• Partial wings may have other useful functions that nobody has thought of yet.

http://www.talkorigins.org/indexcc/CB/CB921_2.html

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The answers to your questions are out there. Your continuing to ask these questions here with an air of incredulity is either because you don't like the answers for some reason and prefer willful ignorance, or you're too fucking lazy to educate yourself. Read a book, for Christ's sake.