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Northern Grey-headed Sparrow
The northern grey-headed sparrow (''Passer griseus''), also known as the grey-headed sparrow, is a species of bird in the sparrow family Passeridae, which is resident in much of tropical Africa. It occurs in a wide range of open habitats, including open woodlands and human habitation, often occupying the same niche as the house sparrow does in Eurasia. The adult northern grey-headed sparrow has a pale grey head with a white moustache stripe, pale brown upperparts, whitish underparts and chestnut wings with a small white shoulder patch. The sexes are similar, but young birds are slightly duller and lack the white wing patch. There are three subspecies, differing in plumage tone, especially with regard to the darkness of the head. This sparrow is mainly resident in its range, but there is some seasonal movement, and flocks of up to 50 birds form outside the breeding season. It builds a cup nest in trees, thatch, or old nests of other birds; 2–4 eggs are laid. This species fee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semliki Wildlife Reserve
The Semliki Wildlife Reserve is a conservation protected area in the Western Region of Uganda with headquarters at Karugutu in Ntoroko District. Geography Semliki Wildlife Reserve is located in Kabarole and Ntoroko districts, in the Toro sub-region, on the floor of the rift valley, where Lake Albert, the Rwenzori Mountains and the Kijura escarpment create backdrops. The reserve is about , by road, north of Fort Portal, the nearest large city. History First established in 1926 by the British colonial Government, the reserve is one of the oldest protected areas in Uganda extending from the Kijura escarpment, north to the River Muzizi and Lake Albert to the low Butuku plains in the West. Since 2005, the area is considered an Lion Conservation Unit. Flora and fauna The dominant vegetation in Semliki is open ''Acacia-Combretum'' woodland and grassy savanna, interspersed with patches of '' Borassus'' palm forest. There is significant belts of riparian woodland along the main ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis Jean Pierre Vieillot
Louis Pierre Vieillot (10 May 1748, Yvetot – 24 August 1830, Sotteville-lès-Rouen) was a French ornithologist. Vieillot is the author of the first scientific descriptions and Linnaean names of a number of birds, including species he collected himself in the West Indies and North America and South American species discovered but not formally named by Félix de Azara and his translator Sonnini de Manoncourt. He was among the first ornithologists to study changes in plumage and one of the first to study live birds. At least 77 of the genera erected by Vieillot are still in use. Biography Vieillot was born in Yvetot. He represented his family's business interests in Saint-Domingue (Haiti) on Hispaniola, but fled to the United States during the Haitian rebellions that followed the French Revolution. On Buffon's advice, he collected material for the ''Histoire naturelle des oiseaux de l'Amérique Septentrionale,'' the first two volumes of which were published in France beginning i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Old World Sparrow
Old World sparrows are a group of small passerine birds forming the family Passeridae. They are also known as true sparrows, a name also used for a particular genus of the family, ''Passer''. They are distinct from both the New World sparrows, in the family Passerellidae, and from a few other birds sharing their name, such as the Java sparrow of the family Estrildidae. Many species nest on buildings and the house and Eurasian tree sparrows, in particular, inhabit cities in large numbers. They are primarily seed-eaters, though they also consume small insects. Some species scavenge for food around cities and, like gulls or pigeons, will eat small quantities of a diversity of items. Description Generally, Old World sparrows are small, plump, brown and grey birds with short tails and stubby, powerful beaks. The differences between sparrow species can be subtle. Members of this family range in size from the chestnut sparrow (''Passer eminibey''), at and , to the parrot-billed spa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecological Niche
In ecology, a niche is the match of a species to a specific environmental condition. Three variants of ecological niche are described by It describes how an organism or population responds to the distribution of resources and competitors (for example, by growing when resources are abundant, and when predators, parasites and pathogens are scarce) and how it in turn alters those same factors (for example, limiting access to resources by other organisms, acting as a food source for predators and a consumer of prey). "The type and number of variables comprising the dimensions of an environmental niche vary from one species to another ndthe relative importance of particular environmental variables for a species may vary according to the geographic and biotic contexts". See also Chapter 2: Concepts of niches, pp. 7 ''ff'' A Grinnellian niche is determined by the habitat in which a species lives and its accompanying behavioral adaptations. An Eltonian niche emphasizes that a spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
House Sparrow
The house sparrow (''Passer domesticus'') is a bird of the sparrow family Passeridae, found in most parts of the world. It is a small bird that has a typical length of and a mass of . Females and young birds are coloured pale brown and grey, and males have brighter black, white, and brown markings. One of about 25 species in the genus ''Passer'', the house sparrow is native to most of Europe, the Mediterranean Basin, and a large part of Asia. Its intentional or accidental introductions to many regions, including parts of Australasia, Africa, and the Americas, make it the most widely distributed wild bird. The house sparrow is strongly associated with human habitation, and can live in urban or rural settings. Though found in widely varied habitats and climates, it typically avoids extensive woodlands, grasslands, and deserts away from human development. It feeds mostly on the seeds of grains and weeds, but it is an opportunistic eater and commonly eats insects and many o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Termite
Termites are small insects that live in colonies and have distinct castes (eusocial) and feed on wood or other dead plant matter. Termites comprise the infraorder Isoptera, or alternatively the epifamily Termitoidae, within the order Blattodea (along with cockroaches). Termites were once classified in a separate order from cockroaches, but recent phylogenetic studies indicate that they evolved from cockroaches, as they are deeply nested within the group, and the sister group to wood eating cockroaches of the genus ''Cryptocercus''. Previous estimates suggested the divergence took place during the Jurassic or Triassic. More recent estimates suggest that they have an origin during the Late Jurassic, with the first fossil records in the Early Cretaceous. About 3,106 species are currently described, with a few hundred more left to be described. Although these insects are often called "white ants", they are not ants, and are not closely related to ants. Like ants and some bees a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swainson's Sparrow
Swainson's sparrow (''Passer swainsonii'') is a species of bird in the sparrow family Passeridae. Sometimes considered a subspecies of the grey-headed sparrow, it occurs in northeastern Africa, largely in the Ethiopian Highlands. This sparrow was named after the English naturalist and illustrator William John Swainson. Description The Swainson's sparrow reaches a body length of . There is no conspicuous sexual dimorphism. It is often considered a race of grey-headed sparrow, but it tends to be darker, especially on the head and shoulders. There is a white bar on the shoulder, but this is not always visible. Similarly, the pale chestnut tail and rump is not always visible. Distribution and habitat It occurs in the highlands of Ethiopia and Somalia, and in some of Sudan, South Sudan, Eritrea, Djibouti, and Kenya. Apart from the far west, it is common throughout its range. Some populations show seasonal migrations. The habitats of the Swainson's sparrow are mountainous area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parrot-billed Sparrow
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The parrot-billed sparrow (''Passer gongonensis'') is found in the arid lowlands of eastern Africa. At and , it is the largest of the sparrows of the family Passeridae. It is often considered a subspecies of the grey-headed sparrow. References External linksParrot-billed sparrow on eBird parrot-billed sparrow Birds of East Africa parrot-billed sparrow The parrot-billed sparrow (''Passer gongonensis'') is found in the arid lowlands of eastern Africa. At and , it is the largest of the sparrows of the family Passeridae. It is often considered a subspecies of the grey-headed sparrow The northe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swahili Sparrow
The Swahili sparrow (''Passer suahelicus'') is a passerine bird of the sparrow family Passeridae. It lives in the savanna of southern Kenya and Tanzania. Until recently, it was usually treated as a subspecies of the northern grey-headed sparrow The northern grey-headed sparrow (''Passer griseus''), also known as the grey-headed sparrow, is a species of bird in the sparrow family Passeridae, which is resident in much of tropical Africa. It occurs in a wide range of open habitats, includ ... (''Passer griseus''), with which it hybridizes in southern Tanzania and possibly elsewhere. It has a more rounded head profile however, a smaller eye and the grey head plumage extends unto the mantle. In addition to the subtle physical characteristics, the Swahili sparrow also differs from the northern grey-headed sparrow in terms of habitat preference, nest construction and post-breeding behaviour. They build grass nests in Acacia trees in dry regions, and generally avoid moister coastal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Grey-headed Sparrow
The southern grey-headed sparrow (''Passer diffusus'') is a passerine bird of the sparrow family Passeridae. It is sometimes treated as a subspecies of the grey-headed sparrow. It is found in savanna and woodland in Angola and Zambia southwards into South Africa, where it is expanding its range and is kept as a caged bird, like its relative the white-rumped seedeater The white-rumped seedeater (''Crithagra leucopygia'') is a species of finch in the family Fringillidae. It is found throughout the Sahel and the eastern part of the Sudan region. Its natural habitat is dry savanna. It is known elsewhere and in .... References External links *Southern Grey-headed Sparrowat the Internet Bird CollectionSouthern Grey-headed Sparrow species textin The Atlas of Southern African Birds southern grey-headed sparrow Birds of Southern Africa Birds described in 1836 {{Passeridae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetics
In biology, phylogenetics (; from Greek language, Greek wikt:φυλή, φυλή/wikt:φῦλον, φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups of organisms. These relationships are determined by Computational phylogenetics, phylogenetic inference methods that focus on observed heritable traits, such as DNA sequences, Protein, protein Amino acid, amino acid sequences, or Morphology (biology), morphology. The result of such an analysis is a phylogenetic tree—a diagram containing a hypothesis of relationships that reflects the evolutionary history of a group of organisms. The tips of a phylogenetic tree can be living taxa or fossils, and represent the "end" or the present time in an evolutionary lineage. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the tree. An un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passer
''Passer'' is a genus of sparrows, also known as the true sparrows. The genus contains 28 species and includes the house sparrow and the Eurasian tree sparrow, two of the most common birds in the world. They are small birds with thick bills for eating seeds, and are mostly coloured grey or brown. Native to the Old World, some species have been introduced throughout the world. Taxonomy The genus ''Passer'' was introduced by the French zoologist Mathurin Jacques Brisson in 1760. The type species was subsequently designated as the house sparrow (''Passer domesticus''). The name ''Passer'' is the Latin word for "sparrow." Studies by Arnaiz-Villena et al. have examined the evolutionary relationships of the genus ''Passer'' with other members of the family Passeridae, and of members of the genus in relation to each other. According to a study by Arnaiz Villena et al. published in 2001, the genus originated in Africa and the Cape sparrow is the most basal lineage. The particular l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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