the plain-mantled tit-spinetail ("leptasthenura aegithaloides") is a small passerine bird of south america belonging to the ovenbird family, furnariidae. it is a common bird across much of chile, southern and eastern argentina, southern peru and western bolivia. it occurs from 0 to 4,300 metres above sea level in a variety of habitats including arid country, open woodland, forest edge, scrub, grassland, parks and gardens. it forages among leaves and branches, searching for insects.