Question: How tall is a Struthio camelus?
Context: The North African ostrich or red-necked ostrich ("Struthio camelus camelus"), also known as the Barbary ostrich, is the nominate subspecies of the common ostrich from West and North Africa.  It is the largest subspecies, making it the largest living bird. The dromedary ( or ), also called the Arabian camel ("Camelus dromedarius"), is a large, even-toed ungulate with one hump on its back.  The dromedary is the smallest of the three species of camel; adult males stand 1.8 – at the shoulder, while females are 1.7 – tall.  Males typically weigh between 400 and , and females weigh between 300 and .  The species' distinctive features include its long, curved neck, narrow chest, a single hump (compared with two on the Bactrian camel and wild Bactrian camel), and long hairs on the throat, shoulders and hump.  The coat is generally a shade of brown.  The hump, 20 cm tall or more, is made of fat bound together by fibrous tissue. Birds are the group of amniotes with the smallest genomes.  Whereas mammal and reptilian genomes range between 1.0 and 8.2 giga base pairs (Gb), bird genomes have sizes between 0.91 Gb (black-chinned hummingbird, "Archilochus alexandri") and 1.3 Gb (common ostrich, "Struthio camelus").  Just as happens to any other living being, bird genomes’ reflect the action of natural selection upon these animals.  Their genomes are the basis of their morphology and behaviour. The Masai ostrich ("Struthio camelus massaicus"), also known as the pink-necked ostrich or East African ostrich, is a large subspecies of the common ostrich native to East Africa.  Today it is farmed for eggs, meat and feathers. The South African ostrich ("Struthio camelus australis"), also known as the black-necked ostrich, Cape ostrich or southern ostrich is a subspecies of the common ostrich endemic to Southern Africa.  It is widely farmed for its meat, eggs and feathers. The largest living bird, a member of the Struthioniformes, is the ostrich ("Struthio camelus"), from the plains of Africa and Arabia.  A large male ostrich can reach a height of 2.8 m and weigh over 156 kg .  A mass of 200 kg has been cited for the ostrich but no wild ostriches of this massive weight have been verified.  Eggs laid by the ostrich can weigh 1.4 kg and are the largest eggs in the world today. The ostrich or common ostrich ("Struthio camelus") is either one or two species of large flightless birds native to Africa, the only living member(s) of the genus "Struthio", which is in the ratite family.  In 2014, the Somali ostrich ("Struthio molybdophanes") was recognized as a distinct species. Birds (Aves) 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 strong yet lightweight skeleton.  Birds live worldwide and range in size from the 5 cm bee hummingbird to the 2.75 m 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.  Birds are the closest living relatives of crocodilians.  Birds are descendants of extinct dinosaurs with feathers, making them the only surviving dinosaurs according to cladistics. The Arabian ostrich or Syrian ostrich ("Struthio camelus syriacus") is an extinct subspecies of the ostrich that lived on the Arabian Peninsula and in the Near East until the mid-20th century. The Syrian camel, Camelus "moreli", is an extinct species of camel from Syria.  It has been discovered in the Hummal area of the western Syrian desert.  Found to have existed around 100,000 years ago, the camel was up to 3 metres (9.8 feet) tall at the shoulder, and 4 metres (13 feet) tall overall.  The first of the fossils were discovered late in 2005, and several more were discovered about a year later.  The new camelid was found together with Middle Paleolithic human remains.
Answer: 2.75 m