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Due to their rod-like shape, they were identified as eumelanosomes, which correspond to dark shades. Although specific colours were not stated in the analysis, other studies have shown that coloration in extant birds correlates to the length and aspect ratio (length to width ratio) of their eumelanosomes. A sample taken from the crural feathers ...
Chameleons - Colour change signals a chameleon's physiological condition and intentions to other chameleons. [3] [4] Because chameleons are ectothermic, they change color also to regulate their body temperatures, either to a darker color to absorb light and heat to raise their temperature, or to a lighter color to reflect light and heat, thereby either stabilizing or lowering their body ...
Animal colouration is the general appearance of an animal resulting from the reflection or emission of light from its surfaces. Some animals are brightly coloured, while others are hard to see. In some species, such as the peafowl, the male has strong patterns, conspicuous colours and is iridescent, while the female is far less visible.
[27] [28] For example, most extinct animals' coloration and patterning are unknown from fossil evidence, but these can be plausibly restored in illustration based on known aspects of the animal's environment and behavior, as well as inference based on function such as thermoregulation, species recognition, and camouflage.
The reviewer, noting Wallace's different opinion, has no difficulty with Poulton's view of sexual selection, that it is "due to an aesthetic sense in the [female] animals", [11] and likes Poulton's expression that "Natural Selection is a qualifying examination which must be passed by all candidates for honours; Sexual Selection is an honours ...
Top: A male ornate boxfish (aracana ornata). Bottom left: a close-up of the boxfish’s natural hexagonal pattern. Bottom center: fish pattern simulation based on Turing’s reaction-diffusion theory.
Anchiornis is a genus of small, four-winged paravian dinosaurs, with only one known species, the type species Anchiornis huxleyi, named for its similarity to modern birds.The Latin name Anchiornis derives from a Greek word meaning "near bird", and huxleyi refers to Thomas Henry Huxley, a contemporary of Charles Darwin.
Archaeologists have unravelled the mystery of a strange skeleton from Belgium consisting of bones from five people who lived 2,500 years apart. The skeleton, unearthed in the 1970s at a Roman ...