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The thick-billed parrot (Rhynchopsitta pachyrhyncha) is a medium-sized parrot endemic to Mexico that formerly ranged into the southwestern United States. Its position in parrot phylogeny is the subject of ongoing discussion; it is sometimes referred to as thick-billed macaw or thick-billed conure .
Rhynchopsitta pachyrhyncha (Swainson, 1827) Sierra Madre Occidental in Mexico (and reintroduced to the U.S.) [13] Size: A mostly green medium-sized parrot, 38 cm (15 in) long. Adults have a large black bill. a red brow, amber irises, red at the bend of the wings, and red thighs. Juveniles have brown irises and a pale peak.
Edward Hitchcock's fold-out paleontological chart in his 1840 Elementary Geology. Although tree-like diagrams have long been used to organise knowledge, and although branching diagrams known as claves ("keys") were omnipresent in eighteenth-century natural history, it appears that the earliest tree diagram of natural order was the 1801 "Arbre botanique" (Botanical Tree) of the French ...
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A spindle diagram is not an evolutionary tree: [18] the taxonomic spindles obscure the actual relationships of the parent taxon to the daughter taxon [17] and have the disadvantage of involving the paraphyly of the parental group. [19] This type of diagram is no longer used in the form originally proposed. [19]
The evolution of tetrapods began about 400 million years ago in the Devonian Period with the earliest tetrapods evolved from lobe-finned fishes. [1] Tetrapods (under the apomorphy-based definition used on this page) are categorized as animals in the biological superclass Tetrapoda, which includes all living and extinct amphibians, reptiles, birds, and mammals.
Micropterix aureatella, a micropterigid moth. The insect order Lepidoptera consists of moths and butterflies (43 superfamilies). [1] Most moths are night-flying, while the butterflies (superfamily Papilionoidea) are the mainly day-flying.
The basal bird Archaeopteryx, from the Jurassic, is well known as one of the first "missing links" to be found in support of evolution in the late 19th century. Though it is not considered a direct ancestor of modern birds, it gives a fair representation of how flight evolved and how the very first bird might have looked.