In zoology, dactyly is the arrangement of digits (fingers and toes) on the hands, feet, or sometimes wings of an animal. It comes from the Greek word daktulos, meaning "finger". Zoology is the biological discipline which involves the study of animals. ... Digit may refer to: A finger or a toe Numerical digit, as used in mathematics or computer science Digit (unit), an ancient meterological unit Digit (magazine), an Indian information technology magazine This is a disambiguation page: a list of articles associated with the same title. ... Fingers of the human left hand The finger is any of the digits of the hand in humans and other species such as the great apes. ... Toes on foot. ... A human hand typically has four fingers and a thumb. ... This article is about a foot as a unit of length. ... A Laughing Gull on the beach in Atlantic City. ... Phyla Animals are a major group of organisms, classified as the kingdom Animalia or Meta­zoa. ... A word is a unit of language that carries meaning and consists of one or more morphemes which are linked more or less tightly together. ...

Zygodactyly

Zygodactyl refers to birds which have "yoked" feet, that is with two toes facing forward and two back. This arrangement is most common in arboreal species, particularly those that climb tree trunks or clamber through foliage. Orders Many - see section below. ... This article is about the biological organisms known as trees. ... The coniferous Coast Redwood, the tallest tree species on earth. ...

Zygodactyly occurs in the woodpeckers and flickers, nuthatches, and parrots. Genera Jynx Picumnus Sasia Nesoctites Melanerpes Sphyrapicus Xiphidiopicus Campethera Geocolaptes Dendropicos Dendrocopos Picoides Veniliornis Piculus Colaptes Celeus Dryocopus Campephilus Picus Dinopium Chrysocolaptes Gecinulus Sapheopipo Blythipicus Reinwardtipicus Meiglyptes Hemicircus Mulleripicus Woodpeckers are near passerine birds of the order Piciformes. ... Binomial name Colaptes auratus (Linnaeus, 1758) The Flicker (Colaptes auratus) is a North American woodpecker with a brown back. ... Species 22 species, see text The nuthatches are a family, Sittidae, of generally very similar small passerine birds found throughout the Northern hemisphere. ... Families Cacatuidae Psittacidae Parrots or Psittacines (order Psittaciformes) includes about 353 species of bird which are generally grouped into two families: the Cacatuidae or cockatoos, and the Psittacidae or true parrots. ...

Syndactyly

Human foot with partial syndactyly.

In birds, two of three toes in front are partially fused to make digging easier. This is characteristic of Coracciformes (Kingfishers, Bee-eaters, Rollers, and relatives). Image File history File links Download high resolution version (1560x1226, 101 KB) Summary I made this picture myself. ... Image File history File links Download high resolution version (1560x1226, 101 KB) Summary I made this picture myself. ...

In humans, syndactyly is when two digits of the hands or feet are fused together. While syndactyly is considered normal in birds and in some mammals, such as the siamang, it is very unusual in humans. This article is about modern humans. ... Orders Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Eutheria (excludes extinct ancestors) Afrosoricida Anagaloidea (extinct) Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Dinocerata (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Mesonychia (extinct) Notoungulata (extinct) Perissodactyla Pholidota Plesiadapiformes... Binomial name Symphalangus syndactylus (Raffles, 1821) The Siamang (Symphalangus syndactylus) is an arboreal black furred gibbon native to the forests of Malaysia and Sumatra. ...

Syndactyly can be full or partial, and is present at birth (congenital). In early fetal development, webbing (syndactyly) of the toes and fingers is normal. At about 16 weeks of gestation, the toes and fingers usually separate and the webbing disappears. But in some fetuses, this separation doesn't occur. The exact cause isn't known.

Syndactyly usually does not affect the function of the foot or toes and should not interfere with walking. Although webbing of the fingers usually doesn't affect the function of the hand, it can affect function of the fingers. Treatment of webbed toes and fingers is corrective or reconstructive surgery, which involves general anesthesia. These repairs are usually done when a child is between 6 months and 2 years old.

Ectrodactyly

A fusing of almost all digits on all of the hands and feet is ectrodactyly. News anchor Bree Walker is probably the best-known person with this condition, which affects about one in 91,000 people. Bree Walker (b 195-) is a well-known television network news anchor in San Diego, New York City, and Los Angeles. ...

Hyperdactyly

An excess of digits is called hyperdactyly or polydactyly, such as in the extremely rare case that a person has six fingers or toes on a single hand or foot. Person, in the classic sense, refers to a living human being. ...

Hypodactyly

A lack of digits not caused by an amputation is called hypodactyly. Amputation is the removal of a body extremity by trauma or surgery. ...