The Rhinoceros Iguana (Cyclura cornuta) is a large reptile – it is a lizard.
The Rhinoceros Iguana is grey-brown or grey-green. It has a bony horn-like lump on its nose, which looks like a rhinoceros horn. It has a crest of pointed scales from the nape of its neck to to the tip of its long tail. It has blue eyes.
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The Rough Scaled Python (Morelia carinata) is a large Australian snake. It is one of Australia’s rarest snakes.
The Rough Scaled Python is slim with large dry-looking scales. It is light-brown and medium-brown with darker red-brown marks. Its belly is white.
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What is keratin?
Keratin is a strong, fibre-based protein material.
Keratin is found on amphibians, birds, mammals, and reptiles.
Keratin is the material in animal beaks, bills, claws, feathers, fingernails, hair, hooves, horns, scales, shells, talons, toenails, and wool. It is also in the outer layer of human skin.
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The African Five-Lined Skink (Trachylepis quinquetaeniata) is an African lizard found mainly in East Africa. It is also called the Blue-Tailed Skink.
The African Five-Lined Skink is a slim, long brown lizard with smooth glossy scales that has five pale stripes on its back and sides, merging into a blue tail. It has small legs.
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The African Eastern Striped Skink (Trachylepis striata striata) is a lizard found in East Africa and southern Africa.
The African Eastern Striped Skink is brown or bronze-coloured with two yellowish stripes that run lengthwise on either side of the spine. It has smooth glossy scales, with metallic reflections, sometimes with pearly whitish spots.
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External covering is the outside appearance of an animal. Animals can have fur, feathers, hair, short hair, long hair, smooth hair, bristles, skin, thick skin, moist skin, dry skin, scales, waterproof scales, small scales, overlapping scales, spikes, hard shells, soft shells, smooth shells, rough shells, wool, or no covering at all.
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Iridescence means shiny with many colours. Many animals have iridescent colours.
Iridescence is structural colour from refracted light (crystals), diffraction gratings (feathers or butterfly wings), thin film (oily surfaces), multiple layer interference (nacre in shells), or 3-D arrays of spheres (opals).
The word iridescence comes from iris, the Greek word for rainbow. An iridescent object has many tones of colour. Iridescence creates colour by splitting and reflecting light from different structures – which is why it is often called structural colour.
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