The Inambú (Nothura maculosa) feathers are very adequate for soft hackle flies, I like to use those covering wing ones, they are good for small size flies.
Spanish colonizers named “partridge” to these birds because were pretty similar to european partridges.
Even to this day, in Argentina the Inambúes are known as “perdiz chica” (small partridge), but the truth is that this is a local species and the original name derived from the native Guarani language.
I want to mention that inhabits much of our territory and hunting is allowed within the season.
Here a couple of photos and illustration:
[(c) Jorge Rodríguez Mata. Inambú chico común (Spotted Nothura).
Adulto, 26cm. Dibujo. Fuente: “Nueva Guía de las Aves Argentinas. M. Canevari et al. 1991. Fundación Acindar.”]