A typical-looking spinetail with a very restricted range in central Colombia. Gray-brown overall with a rusty or rufous crown and wings, and a long, spiky grayish tail. Throat looks dark, not silvery. Fairly common in forests, edges, and thickets from around 2,000 to 3,200 m. Skulking and fairly difficult to see. Compare with Azara’s Spinetail, which has a rufous tail. Listen for long descending chatters and chip calls.