Information:  - Phylloscopidae is a newly described family of small insectivorous birds formerly placed in the Old World warbler family. Phylloscopidae contains two genera, "Phylloscopus" and "Seicercus", respectively containing around 55 and 11 species. The leaf warblers are a branch of "Old World warblers," one of 10 or more branches that sprouted as Families with the break-up of the Sylviidae.  - The aberrant bush warbler ( Horornis flavolivaceus ) is a species of bush warbler ( family Cettiidae ) . It was formerly included in the `` Old World warbler '' assemblage . It is found in central and southern China , and the northern extremes of Burma and Vietnam .  - A kinglet, or crest, is a small bird in a group that is sometimes included in the Old World warblers, but is frequently placed in its own family, Regulidae, because of resemblance to titmice. "Regulidae" is derived from the Latin word "regulus" for "petty king" or prince, and refers to the coloured crowns of adult birds. This family has representatives in North America and Eurasia. There are seven species in this family; one, the Madeira firecrest, "Regulus madeirensis", was only recently split from common firecrest as a separate species. One species, the ruby-crowned kinglet, differs sufficiently in its voice and plumage to occasionally be afforded its own genus, "Corthylio". Description. Kinglets are among the smallest of all passerines, ranging in size from and weighing ; the sexes are the same size. They have medium-length wings and tails, and small needle-like bills. The plumage is overall grey-green, offset by pale wingbars, and the tail tip is incised. Five species have a single stiff feather covering the nostrils, but in the ruby-crowned kinglet, this is replaced by several short, stiff bristles. Most kinglets have distinctive head markings, and the males possess a colourful crown patch. In the females, the crown is duller and yellower. The long feathers forming the central crown stripe can be erected; they are inconspicuous most of the time, but are used in courtship and territorial displays when the raised crest is very striking.  - Cettia is a genus of small insectivorous songbirds ("warblers") which make up the core of the newly recognized family Cettiidae. They were formerly placed in the Sylviidae, which at that time was a wastebin taxon for the warbler-like Sylvioidea. The range of this genus extends from Europe to southeast Asia.  - Deoxyribonucleic acid (DNA) is a molecule that carries the genetic instructions used in the growth, development, functioning and reproduction of all known living organisms and many viruses. DNA and RNA are nucleic acids; alongside proteins, lipids and complex carbohydrates (polysaccharides), they are one of the four major types of macromolecules that are essential for all known forms of life. Most DNA molecules consist of two biopolymer strands coiled around each other to form a double helix.  - A songbird is a bird belonging to the clade Passeri of the perching birds (Passeriformes). Another name that is sometimes seen as a scientific or vernacular name is Oscines, from Latin "oscen", "a songbird". This group contains some 4,000 species found all over the world, in which the vocal organ typically is developed in such a way as to produce a diverse and elaborate bird song.  - In biology, an organism is any contiguous living system, such as an animal, plant, fungus, archaeon, or bacterium. All known types of organisms are capable of some degree of response to stimuli, reproduction, growth and development and homeostasis. An organism consists of one or more cells; when it has one cell it is known as a unicellular organism; and when it has more than one it is known as a multicellular organism. Most unicellular organisms are of microscopic scale and are thus loosely described as microorganisms. Humans are multicellular organisms composed of many trillions of cells grouped into specialized tissues and organs.  - Old World warblers are a large group of birds formerly grouped together in the bird family Sylviidae. The family held over 400 species in over 70 genera, and were the source of much taxonomic confusion. Two families were split out initially, the cisticolas into Cisticolidae and the kinglets into Regulidae. In the past ten years they have been the subject of much research and many species are now placed into other families, including the Acrocephalidae, Cettiidae, Phylloscopidae, and Megaluridae. In addition some species have been moved into existing families or have not yet had their placement fully resolved. A smaller family of warblers, together with some babblers formerly placed in the family Timaliidae and the parrotbills, are retained in a much smaller family Sylviidae.  - The Acrocephalidae (the reed warblers, marsh- and tree-warblers, or acrocephalid warblers) are a family of oscine passerine birds, in the superfamily Sylvioidea.  - In biology, a species (abbreviated sp., with the plural form species abbreviated spp.) is the basic unit of biological classification and a taxonomic rank. A species is often defined as the largest group of organisms in which two individuals can produce fertile offspring, typically by sexual reproduction. While this definition is often adequate, looked at more closely it is often problematic. For example, in a species complex, the boundaries between closely related species become unclear or disappear altogether. Other ways of defining species include similarity of DNA, morphology, or ecological niche. The presence of locally adaptive traits may further subdivide species into infraspecific taxa such as subspecies.  - Sylviidae is a family of passerine birds that was part of an assemblage known as the Old World warblers. The family was a wastebin taxon with over 400 species of bird in over 70 genera. Advances in classification, particularly helped with molecular data, have led to the splitting out of several new families from within this group. Today the smaller family Sylviidae includes the typical warblers in the genus "Sylvia", the parrotbills of Asia (formerly a separate family Paradoxornithidae), a number of babblers formerly placed within the family Timaliidae (which is being split) and the wrentit, a North American bird that has been a longstanding taxonomic mystery.  - Sexual reproduction is a form of reproduction where two morphologically distinct types of specialized reproductive cells called gametes fuse together, involving a female's large ovum (or egg) and a male's smaller sperm. Each gamete contains half the number of chromosomes of normal cells. They are created by a specialized type of cell division, which only occurs in eukaryotic cells, known as meiosis. The two gametes fuse during fertilization to produce DNA replication and the creation of a single-celled zygote which includes genetic material from both gametes. In a process called genetic recombination, genetic material (DNA) joins up so that homologous chromosome sequences are aligned with each other, and this is followed by exchange of genetic information. Two rounds of cell division then produce four daughter cells with half the number of chromosomes from each original parent cell, and the same number of chromosomes as both parents, though self-fertilization can occur. For instance, in human reproduction each human cell contains 46 chromosomes, 23 pairs, except gamete cells, which only contain 23 chromosomes, so the child will have 23 chromosomes from each parent genetically recombined into 23 pairs. Cell division initiates the development of a new individual organism in multicellular organisms, including animals and plants, for the vast majority of whom this is the primary method of reproduction.  - Cettiidae is a newly validated family of small insectivorous songbirds ("warblers"), formerly placed in the Old World warbler "wastebin" assemblage. It contains the typical bush warblers ("Cettia") and their relatives. As a common name, cettiid warblers is usually used.  - The Cisticolidae family of small passerine birds is a group of about 110 warblers found mainly in warmer southern regions of the Old World. They are often included within the Old World warbler family Sylviidae.    Given the information above, choose from the list below the object entity that exhibits the relation 'parent taxon' with the subject 'aberrant bush warbler'.  Choices: - acrocephalidae  - animal  - bird  - cettia  - cettiidae  - cisticolidae  - helix  - human  - kinglet  - passeri  - phylloscopidae  - regulidae  - seicercus  - sylviidae  - sylvioidea
A:
cettia