I imagine them having very course fur with large feathery protrusions around its tail and head. These would be in the shape and colour of a foliage type in its habitat. When resting or hiding it would curl the feathers around its body, little legs sticking out the bottom, looking like a shrub. If startled it would uncurl its feathers, revealing the violent colours within, vibrating them and running around. A herd of these guys would be amazing, disturbing what appears to be a lush pocket of greenery only to see it flee off in a burst of colour and chirping.