Identificaciones de diego_amazonia

Any thoughts on this would be very helpful. Only mountain viscacha seems to be probable as a medium-sized mammal in this area but as far as I can tell the ears of this animal seem too long and hunched-down position in the grass seems unusual for this species too. It appears to me more like a lagopus ssp. but only Andean tapeití seems to occur in this region which also doesn't match this animal's appearance.

Any thoughts on this would be very helpful. Only mountain viscacha seems to be probable as a medium-sized mammal in this area but as far as I can tell the ears of this animal seem too long and hunched-down position in the grass seems unusual for this species too. It appears to me more like a lagopus ssp. but only Andean tapeití seems to occur in this region which also doesn't match this animal's appearance.