The Apolinar's wren (Cistothorus apolinari) is a passerine bird in the Troglodytidae family. It is endemic to the Andean areas of Colombia. Its natural habitats are subtropical or tropical high-altitude grassland (between 2500 to 4000 metres altitude), freshwater lakes, and freshwater marshes. It is threatened by habitat loss. Its Spanish common name is cucarachero de pantano (literally: swamp cockroach hunter). This bird is small, (near 13 cm length) with brown head, grey patches around the eyes, streaked dark back and reddish tail.