Family Acanthisittidae is a small family of passerine birds that includes only the New Zealand wrens. These birds are also known by several synonyms, including Acanthisitta, the genus name for the New Zealand wrens, and the family name Xenicus, which was used before the taxonomy was revised. Other synonyms for the family Acanthisittidae include the common name "rock wrens" and the subfamily name Acanthisittinae. While these birds may be small in number and distribution, they are an important part of New Zealand's endemic avifauna and have captured the attention of many birdwatchers and ornithologists alike.