Хохлатая колючехвостка Leptasthenura platensis

Small, charismatic species with a long spiky tail and a short crest. Has generally pale gray-brown plumage with a streaked throat and crest. Occurs in woodland, scrub, and gallery forests. Forages acrobatically from the understory up to the canopy. The song starts with sharp notes and ends with a very thin trill: “tsi, tsirrrrr.”