Feather tracts

FEATHER TRACTS
  • Even though the body of the bird looks fully covered with feathers, it has originated only from certain definite feather tracts called "Pterylae". There are 10 pairs of feather tracts.
    • Cephalic
    • Alar
    • Humoral
    • Spinal
    • Crural
    • Ventral
    • Femoral
    • Cervical
    • Auxiliary
    • Caudal 
  • During the moulting process, the feathers are shed in a particular pattern starting from the cephalic tract and finally ending with the crural tract.
Last modified: Monday, 21 November 2011, 11:37 AM