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Fawn Mutation
 
                         
   

 

The fawn mutation within the Shafttail Finches is a common mutation. It is believed that the fawn variety is a color mutation qualitatively changing the appearance of eumelanin pigment from black to dark brown as a result of its incomplete oxidation. The inheritance of the fawn mutation is recessively sex-linked. This means that a fawn mutant from two normally colored parents will always be a female. Fawn males are rare because they can only be born from a fawn mother and a normal father that has been split to this mutation, and of course, from parents that are both the fawns.

 

 
   
   
   
   
   
   
   
                     
                         
  Bird coloration Head (crown) Eye Lore Throat    bib Chest Back Flight feathers  Trouser stripe Tail feathers  
   
  Normal (wild type) silver-gray black black black grayish brown    brownish brownish black black  
   
  Fawn silver-gray black brown brown grayish brown  brownish brownish brown dark brown  
   
                         
                         
  Some members of my flock                  
                         
     
     
     
     
     
     
     
     
     
     
     
     
                         
                         
         
     
     
     
     
     
     
     
     
     
     
     
                         
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