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Slate Budgerigar Mutation
The Slate budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. It is the underlying mutation of the Slate variety. Appearance The name 'Slate' is derived from the appearance of blue-series Slates, particularly the Skyblue Slate, which is close in colour to a Light Grey but with a more bluish tone. The Light Green Slate is intermediate in shade between a Light Green and a Light Grey-Green. In both blue- and green-series Slates the cheek patch is purplish-grey or deep violet, somewhat like the cheek patches of Mauves. The long tail feathers are a little darker than the corresponding non-Slate. Other features are unaffected by this mutation. The Dark mutation produces a more noticeable effect in combination with Slate than it does with Grey, but these darker Slate shades differ from one another very much less than Skyblue, Cobalt and Mauve differ.Taylor, T G and Warner, C (1986) p 43-44 The Cobalt Slate and Mauve Slate are distinctly da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slate Color Mutation Budgerigar
Slate is a fine-grained, foliation (geology), foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcano, volcanic ash (volcanic), ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression. The foliation in slate is called "slaty cleavage". It is caused by strong compression causing fine grained clay flakes to regrow in planes perpendicular to the compression. When expertly "cut" by striking parallel to the foliation, with a specialized tool in the quarry, many slates will display a property called fissility (geology), fissility, forming smooth flat sheets of stone which have long been used for roofing, floor tiles, and other purposes. Slate is frequently grey in color, especially when seen, en masse, covering roofs. However, slate o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
