This is a new mutation that I'm getting into.  Long feathers are very popular in Europe, but haven't gained much ground here.  They are bigger in size and a little deeper in color than Regular Peachfaced birds.

        Longfeathers
Every bird is beautiful in its own way...
Picture 1 -- Green Longfeather Bird.  The bird to the left is a Normal Longfeather bird.  The bird to the right of it is an Opaline. Notice the size difference.

 

 

 

Picture 2 -- Orangefaced Green Longfeather Baby. 
Picture 3 -- Green Longfeather Baby.  This bird is not an adult yet, but not as young as the baby in picture 2.  You can see that he already has a nice red face which is characteristic of longfeathers. 
*** When exhibiting Longfeather lovebirds, judges look to see how "pure" the longfeather is.  In the US at least, it is greatly looked down upon by judges to cross a Longfeather with a Normal bird to get a bigger bird that ends up being classified as a percentage longfeathered and then a percentage normal and end up being really neither.  This topic was brought up at the National Bird Show in Michigan in 2004 due to some breeders trying to exhibit the mixed percentage birds in the normal peachfaced category.  So if you do purchase a Longfeathered bird for exhibiting purposes, knowing the bloodlines, the genetics, and the origin of the bird's ancestry is even more so important. 

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Picture 4 -- Comparison of Orangeface Dark Green Longfeather(8 days old) with a 16 day old normal peachface.  They're almost the same size.