C Calcification The process by which tissues become hardened by the deposition of calcium salts. Canidia Fungal spores. Canker Synonymous with trichomoniasis in doves and pigeons. Cap In the Lizard canary, the light area of feathering on the crown of the head. Cap Marked A dark area of feathers on the top of the head in other canaries Cell The container for chromosomes. Cestodes  Flattened, usually segmented; parasitic worms, tapeworms. Cholinesterase enzymes Enzymes that are particularly important in the transmission of nerve impulses; the activity of these enzymes is inhibited by exposure to organophosphorus and carbamate compounds, and death results when activity is greatly reduced. Chromosome A microscopic structure, made out of DNA, which carries the genes. All cells within the body have a set of chromosomes . Each chromosomes contains a large number of genes except for the Y-chromosome in female birds. No genes have ever been found on it. Chronic Persisting for a relatively long time. Chronic losses Mortality of attrition; small numbers of continual losses over extended periods of time. Circo Virus The Circo Virus is the causative agent of the Psittacine beak and feather disease (PBFD) Read more about this disease> Cinnamon In coloured canaries another term used for a brown canaries Clear In coloured canaries also called Lipochrom canary. A bird possessing no dark pigmentaton in its plumage at all. Clear Capped A Lizard canary whose cap is unbroken by an dark feathering, provided that it has reasonably regular outline. Clinical sign  An abnormal physiological change or behavior pattern that is indicative of illness. Signs are externally observable, as contrasted with symptoms, which are subjective. Cloaca A common passage for the fecal, urinary, and reproductive discharges of most lower vertebrates (birds, reptiles, and amphibians). Coccidiasis  The presence of coccidia, protozoa of the subphylum Sporozoa. Coccidiosis  A disease caused by coccidia, protozoa of the subphylum Sporozoa. Colibacillosis  Infection with the bacterium Escherichia coli. Colon  The large intestine. Colonial nesters Birds that nest in large groups. Colour Fed Given special food at moulting time to turn the plumage to some shade of orange or red colour. Used only in special canary species (red factor birds, Lizards, Norwich and Yorkshires) Congestion The abnormal accumulation of blood in a tissue or organ; often causes a reddening of the affected area. Consort The plainhead bird of the Gloster Fancy bred Contagious  Capable of being transmitted from animal to animal, such as a contagious disease. Coppy The crested bird of the Lancashire breed. Also often used for the crest itself. Corona The crested bird of the Gloster Fancy bred Craw see Jabot Crest Either the general term used for this particular feature in any breed, or specially as a shortened form for the Crested canary. Crimson (colour) A rich deep red colour tending to purple. Crop A dilation of the esophagus at the base of the neck of some birds. Crossover When a pair of chromosomes trade genes. Culmen Culmen is the name for the upper ridge of a bird's bill Cyanobacteria A genus of bacteria composed of the blue-green algae; like the dinoflagellates. Cyanobacteria are important sources of environmental toxins that can cause illness and death in humans and wildlife.
D Dehydration A condition that results from excessive loss of body fluids. Depopulation The destruction of an exposed or infected group of animals. Dermatophytosis A fungal infection of the skin. Digestive tract (alimentary canal) The organs associated with the ingestion, digestion, and absorption of food, such as the esophagus, stomach, and intestines . Dimorphic In coloured canaries also called Mosaic canary.  In coloured canaries, a mutation form in which the colour is confined to four small areas only. (face, shoulders, rump and breast) Direct life cycle A parasitic life cycle that requires only a single host for its completion. Diurnal Active during the day. DNA Deoxyribonucleic acid, a natural substance which stores genetic information as an intertwined double chain. The body reads the code stored in this chain to learn how to assamble proteins from amino acids. Dominant The opposite of recessive. A gene that is visible when paired with other genes. The most expressive gene at the allele of a chromosome  pair. Double-Factor: in Gouldian Finches  Two identical "copies" for a gene are present in the gene pair (one copy per chromosome); abbreviated as DF or DBF and sometimes used interchangeably with "homozygous" when referring to autosomal traits or sex-linked traits in a cock bird. ... read more about the Genetic of Gouldian Finches> DOPA Dihychoxyphenylalanine,  a natural chemical which the body makes as a step in the process of making the pigment melanin. Dominant White One of two mutations that have produced white canaries. The Dominant White canary shows red or yellow fat-colour in wings. Drive-trapping Capture of flightless birds during the moult and of other animals by herding them into a netted or fenced containment area.
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