Des Murs's wiretail (Sylviorthorhynchus desmurii) is a small passerine bird of southern South America which belongs to the ovenbird family Furnariidae.

[3][4][5] The specific epithet was chosen to honour the French ornithologist Marc Athanase Parfait Œillet des Murs.

It is found in western Argentina from Santa Cruz Province north to San Juan and in southern and central Chile from northern Magallanes to Valparaíso Region.

[10] Des Murs's wiretail is also known to occur in dense weedy thickets of plants like gorse over the northern extremity of its range.

[10] Even in undisturbed rainforests, however, wiretails use only the low-level shrub and bamboo layer for foraging, never flying higher than 3 metres (10 ft) above the ground.