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Zabrus is a genus of beetles of the ground beetle family, Carabidae. One species, Zabrus tenebrioides is found in Britain (though it is very rare) and has an unusually convex, deep and clumsy body. They are vegetarian, the larvae often doing serious damage to the young shoots of cereal plants while the adults eat the grains of corn.
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Zacladus is a genus of tiny Snout Beetles (Curculionidae) that live chiefly on Geraniums.
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Zamia are a genus of tropical palm-like plants of the family Cycadaceae. They are natives of the West Indies and South and Central America. They bear pinnate leaves, few in number.
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The zander (Stizostedion lucioperca) is a fish resembling a cross between the pike and the perch. It has a grey-green back, white underside, two dorsal fins and wide mouth with fangs. It is about 60 centimetres long and weighs about 7.5 kg. It is a solitary and voracious predator and lays up to two million eggs per year on vegetation in slow-flowing or still water. It was introduced to Britain 1878, but because it reduces stocks of fish including perch, roach and bream, there have been attempts to control its numbers.
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The Zebra (Equus) is a genus of black (or dark brown) and white vertically striped wild horses, or horse-like mammals, found in Africa. There are currently three surviving species of Zebra: The Grevy's Zebra (Equus grevyi) found in northern Kenya and Somalia; The Mountain Zebra found in south-west Africa which has two sub-species: The Cape Mountain zebra (Equus zebra zebra) and the Hartmann's mountain zebra (Equus zebra hartmannae); the Common Zebra, also known as the Plains Zebra or Burchell's Zebra (Equus burchelli or Equus quagga) found in east and South Africa. A fourth species, the quagga became extinct during the 1870's. Zebras are social animals living in herds and mixing freely with other grazing animals on the open savanahs of Africa south of the Sahara Desert, this interaction between animals is believed to be for mutual defence against predators. The Zebra have acute hearing, gnu which often mix with them have a good sense of smell and Ostrich which are also often to be found in the area have very good vision.
When a Zebra is born its stripes are usually more brown than black, and become darker with age.
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The zebra finch (Taeniopyga castanotis) is an Australian weaverfinch. It has a red bill and the males are grey above with white under parts, reddish flanks, and black-and-white barred throat, breast, and tail. Zebra finches are popular cagebirds.
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The zebra fish or zebra danio (Brachydanio rerio) is a tropical freshwater fish, found in East India and popular in aquaria. It has a shiny blue body, up to 4.5 centimetres long, with four yellowish stripes along its sides.
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The Zebra Spider (Salticus scenicus) is a hairy-bodied British jumping spider named after its black and white stripes. The spider stalks its prey and then leaps at them.
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The Zebra Swallowtail (Eurytides marcellus) is a butterfly of the family Papilionidae. It is basically brown-black in colour, with the wings obliquely striped with light yellow, almost white, bands. The hind wings are enhanced with vivid carmine spots and blue arcs at the tips.
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The Zemaituka is an ancient breed of Lithuanian pony, now extremely rare and in danger of extinction. The Zemaituka stands about 14 hands high and is mouse dun, bay, black or brown in colour with a dorsal stripe and black points, with an attractive head, large kind eyes and mobile ears. The Zemaituka is among the most enduring of ponies, never tiring and very agile and athletic.
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Zephyrosaurus was a dinosaur of the Cretaceous period. It is known from just a few remains including a skull and a few vertebrae. Zephyrosaurus had small, ridged teeth which would indicate a herbivore,
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Zeugophora is a genus of leaf beetles (Chrysomelidae) represented by three British species found chiefly on poplar trees and also willow and hazel.
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The Zimocca (Euspongia zimocca) is a flat sponge of fine quality found in the Adriatic, about the Greek islands, and off the coast of Barbary.
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Zinnia is a genus of plants of the family Compositae, native to Mexico and South America. Zinnias have stiff hairy stems and daisy-like flowers of various colours. Cultivated zinnias are hybrids derived from a Mexican species and have double flowers, about 11 centimetres across.
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Zoantharia is an order of Anthozoa. They have simple tentacles occurring in multiples of six.
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Zoidogamy is a type of plant reproduction in which male gametes swim in a film of water to the female gametes.
Zoidogamy occurs in algae, bryophytes, pteridophytes, and some gymnosperms.
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Zoogeography is the study of the geographical distributions of animals. The earth can be divided into several zoogeographical regions separated by natural barriers, such as oceans, deserts, and mountain ranges. The characteristics of the fauna of each region are believed to depend particularly on the process of continental drift and the stage of evolution reached when the various land masses became isolated. For example Australia, which has been isolated since Cretaceous times, has the most primitive native mammalian fauna, consisting solely of marsupials and monotremes.
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Zoology is the science which deals with the structure, life-history, habits and activities of animals.
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The zoomastigina are a subclass of Mastigophora.
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Zooplankton is the animal component of plankton. All major animal phyla are represented in zooplankton, as adults, larvae, or eggs; some are just visible to the naked eye but most cannot be seen without magnification. Near the surface of the sea there may be many thousands of such animals per cubic metre.
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Zorochrus is a genus of tiny click beetle (Elateridae), found chiefly in sand on the banks of rivers and streams.
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Zygaenidae is the burnets and foresters family of moths.
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A zygospore is a zygote with a thick resistant wall, formed by some algae and fungi. It results from the fusion of two gametes, neither of which is retained by the parent in any specialized sex organ (such as an oogonium). It enters a resting phase before germination.
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Zyras is a genus of rove beetles, Staphylinidae, represented by nine species in Britain. The species are diverse in form, but all live in the company of ants.
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Zyzomys is a genus of animals of the family Muridae. The genus is characterised by thick, long tails. They are called rock rats in Australia, where they are found in the central and north-central regions where the country is rocky, with poor soil and sparse vegetation.
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