Search results
Results From The WOW.Com Content Network
The genus name of the sparrows, Passer, gives its name to the order of Passeriformes. Birds classified in this order have the highest rate of point mutations among birds, though birds generally have lower rates than mammals. Birds' point mutation rate (1.9 × 10 −3 mutations per site per Ma) is smaller than that of mammals (2.7 × 10 −3 ...
However, in birds and reptiles, this pairing is just the opposite: thus, in Lovebirds, it is the female which has an XY pairing and thus determines the sex of an offspring, depending on whether the mother passes an X gene or a Y gene. It is on the X gene that the genetic information for sex-linked recessive traits is passed.
This is a result of the same genetic mutation as the genuine Blue genetic mutation in all typical parrot and parakeet species. Consequently, White-faced cockatiels are mainly grey with more or less white throughout their plumage. White-faced cocks display brilliant white faces while hens display basically grey faces with some white streaks.
The evolution of birds began in the Jurassic Period, with the earliest birds derived from a clade of theropod dinosaurs named Paraves. [1] Birds are categorized as a biological class, Aves. For more than a century, the small theropod dinosaur Archaeopteryx lithographica from the Late Jurassic period was considered to have been the earliest bird.
Passerines, the "song birds". This is the largest order of birds and contains more than half of all birds. Family Acanthisittidae. Genus Acanthisitta - rifleman; Genus Xenicus - New Zealand wrens; Family Acanthizidae - scrubwrens, thornbills, and gerygones Genus Acanthiza – thornbill; Genus Acanthornis – scrubtit; Genus Aethomyias ...
The Sibley–Monroe checklist is a list of bird species based on a study conducted by Charles Sibley and Burt Monroe. It drew on extensive DNA–DNA hybridization studies to reassess the relationships between modern birds. It was considered a landmark in ornithology on its release. [1]
A Wilson's warbler bird in Alaska. The American Ornithological Society said it is trying to address years of controversy over a list of bird names that include human names deemed offensive.
In this list of birds by common name 11,278 extant and recently extinct (since 1500) bird species are recognised. [1] Species marked with a "†" are extinct.