Indio Avellanado  
Some typical issues of this feather for spanish traditional wet flies:
Head
Body
Ribbing
Example
Orange
Orange
Orange
Papaya Saltona
Yellow
Salmon fuerte
Yellow
Salmón Indio
Black
Orange-Black
Yellow
Tiguer Saltona
Avellana
Rose
Avellana
Avellana
 
Some typical issues of this feather for dry flies:
Head
Body
Ribbing
Example
Yellow
Butano
Yellow
Strong Orange
Avellana
Brown
Gray
Fortuna
         
         
The basic characteristics that define a high-quality feather are Luster, density and Length of the feather's useful part. To give you an aproximatly idea, we have done the following information table:

Origen
Quality
Length of the feather's useful part
Luster
Nº spanish wet flies/bundle of 12 feathers
Riñonada Extra
18 - 20
Riñonada Grado # 1
16 - 18
Riñonada Grado # 2
12 - 14
Colgadera Grado # 3
10 - 12
         
Usually the total number of fibers of colgadera feathers (degree 3) is greater than the others, nevertheless the brightness, length and finure of the fibers, is smaller than in superior degrees, which makes difficult its handling for fly tying. Even if, they are an exceptional option to tie streamers. The other degrees normally are used to tie dry and wet flies.