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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.
The grey crowned crane - an example of a crested bird species A restoration of the dinosaur Anchiornis, showing the crest of feathers on its head. The crest is a prominent feature exhibited by several bird species on their heads.
For example, if we consider the crown-birds (i.e. all extant birds and the rest of the family tree back to their most recent common ancestor), extinct side branches like the dodo or great auk are still descended from the most recent common ancestor of all living birds, so fall within the bird crown group. [4]
The brolga is a common, gregarious wetland bird species of tropical and south-eastern Australia and New Guinea. It is a tall, upright bird with a small head, long beak, slender neck, and long legs. Its plumage is mainly grey, with black wing tips, and it has an orange-red band on its head. The brolga's courting dance is similar to that of other ...
Modern paleontologists define Archosauria as a crown group that includes the most recent common ancestor of living birds and crocodilians, and all of its descendants. The base of Archosauria splits into two clades: Pseudosuchia , which includes crocodilians and their extinct relatives; and Avemetatarsalia , which includes birds and their ...
The ruby-crowned kinglet (Corthylio calendula) is a very small passerine bird found throughout North America. It is a member of the kinglet family. The bird has olive-green plumage with two white wing bars and a white eye-ring. Males have a red crown patch, which is often concealed.
The size and color of its crown patches help to determine a bird's status among its flock mates. Measuring 15–18 cm (6–7 in) in length [9] with a wingspan of 24.75 cm (9.74 in) [10] and ranging from 19.0 to 35.4 g (0.67 to 1.25 oz) in mass, [3] the adult golden-crowned sparrow is fairly large for an American sparrow. [9]
They are typically grey or white, often with black markings on the head or wings. They have longish bills and webbed feet. Terns are a group of generally medium to large seabirds typically with grey or white plumage, often with black markings on the head. Most terns hunt fish by diving but some pick insects off the surface of fresh water.