[VFB] Identifying a cape ?

[Desert Eagle]

Evening folks,
    I have been experimenting with tying some dry flies and wanted to see if
anyone could help me identify a cape I have. Some time ago someone sent me
this in a "Care" package and I want to find out what it is so I can identify
it correctly in a recipe.
    The feathers are the normal "Long Oval" shape with white on the outer
edges and an "Oval" black "Eye" in the middle. I am using them for wings and
they look great.
    Any help in guessing what it may be would be appreciated.
Jimi