Answer the following question: Information: - 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. - Birds (Aves), also known as avian dinosaurs, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton. Birds live worldwide and range in size from the bee hummingbird to the ostrich. They rank as the class of tetrapods with the most living species, at approximately ten thousand, with more than half of these being passerines, sometimes known as perching birds or, less accurately, as songbirds. - Zeltornis ( '' Zelten bird '' ) is an extinct genus of heron . It contains a single species , Zeltornis ginsburgi . Zeltornis probably resembled the modern night herons , but was much larger , standing 2 m ( 6 ft 8 in ) tall and weighing about 15 kg. Its wingspan is estimated at 2.50 m ( 8 ft 4 in ) . It is known from a single right coracoid of which the distal part is missing ( MNHN collection , uncatalogued ) . Nonetheless , the partial bone is distinctive enough to place the species clearly into the heron family . In particular it seems to have been allied most closely to the night herons , although it can not have been a direct ancestor of extant species because the modern genus Nycticorax did already exist in the Oligocene . Zeltornis is named after the mountain Zelten in Libya , where it was found . - The zigzag heron ("Zebrilus undulatus") is a species of heron in the family Ardeidae, also including egrets and bitterns. It is in the monotypic genus Zebrilus. It is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela. Its natural habitat is subtropical or tropical swamps. - Binomial nomenclature (also called binominal nomenclature or binary nomenclature) is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages. Such a name is called a binomial name (which may be shortened to just "binomial"), a binomen or a scientific name; more informally it is also called a Latin name. The first part of the name identifies the genus to which the species belongs; the second part identifies the species within the genus. For example, humans belong to the genus "Homo" and within this genus to the species "Homo sapiens". The "formal" introduction of this system of naming species is credited to Carl Linnaeus, effectively beginning with his work "Species Plantarum" in 1753. But Gaspard Bauhin, in as early as 1623, had introduced in his book "Pinax theatri botanici" (English, "Illustrated exposition of plants") many names of genera that were later adopted by Linnaeus. - Botaurus is a genus of bitterns, a group of wading bird in the heron family Ardeidae. The genus name "Botaurus" was given by the English naturalist James Francis Stephens, and is derived from Medieval Latin "butaurus", "bittern", itself constructed from the Middle English name for the Eurasian Bittern, "Botor". Pliny gave a fanciful derivation from "Bos" (ox) and "taurus" (bull), because the bittern's call resembles the bellowing of a bull. - A genus (genera) is a taxonomic rank used in the biological classification of living and fossil organisms in biology. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. - An egret is a bird that is any of several herons, most of which are white or buff, and several of which develop fine plumes (usually milky white) during the breeding season. - Ixobrychus is a genus of bitterns, a group of wading bird in the heron family Ardeidae. "Ixobrychus" is from Ancient Greek "ixias", a reed-like plant and "brukhomai", to bellow. - Bitterns are a classification of birds in the heron family of Pelican order of wading birds. Species named bitterns tend to be the shorter-necked, often more secretive members of this family. They were called "hferblte" in Old English; the word "bittern" came to English from Old French "butor", itself from Gallo-Roman "butitaurus", a compound of Latin "bti" and "taurus". Bitterns form a monophyletic subfamily in the heron family, the Botaurinae. - The herons are the long-legged freshwater and coastal birds in the family Ardeidae, with 64 recognised species, some of which are referred to as "egrets" or "bitterns" rather than herons. Members of the genera "Botaurus" and "Ixobrychus" are referred to as "bitterns", and, together with the zigzag heron or zigzag bittern in the monotypic genus "Zebrilus", form a monophyletic group within the Ardeidae. Egrets are not a biologically distinct group from the herons, and tend to be named differently because they are mainly white or have decorative plumes. Although egrets have the same build as herons, they tend to be smaller. Herons, by evolutionary adaptation, have long beaks. After reading the paragraphs above, we are interested in knowing the entity with which 'zeltornis' exhibits the relationship of 'parent taxon'. Find the answer from the choices below. Choices: - animal - ardeidae - bird - bittern - botaurus - homo - ixobrychus - ostrich - plant - zebrilus
Answer:
ardeidae