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Golden-winged Sunbird
The golden-winged sunbird (''Drepanorhynchus reichenowi'') is a species of bird in the family Nectariniidae. Three subspecies are recognised. It is found in Democratic Republic of the Congo, Kenya, Tanzania, and Uganda. Description The male golden-winged sunbird is about 9 in (23 cm) long and the female is about 6 in (15 cm) long, the male having long central tail feathers. Yellow-edged feathers in the wings and tail are key identification pointers in all plumages of both the male and female. Body feathers of the male in breeding condition are a conspicuous metallic reddish-copper colour, which are mostly replaced by dull-black feathers in the non-breeding condition. The underparts of the male are brownish-black. The female is olive above and yellowish below. Immature are similar to females, except their underparts are darker. Taxonomy German naturalist Gustav Fischer described the golden-winged sunbird in 1884, its species name honouring Anton Reichenow. It is classi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonotis
''Leonotis'' is a genus of flowering plants in the family Lamiaceae.Raymond M. Harley, Sandy Atkins, Andrey L. Budantsev, Philip D. Cantino, Barry J. Conn, Renée J. Grayer, Madeline M. Harley, Rogier P.J. de Kok, Tatyana V. Krestovskaja, Ramón Morales, Alan J. Paton, and P. Olof Ryding. 2004. "Labiatae" pages 167-275. In: Klaus Kubitzki (editor) and Joachim W. Kadereit (volume editor). ''The Families and Genera of Vascular Plants'' volume VII. Springer-Verlag: Berlin; Heidelberg, Germany. One species, ''Leonotis nepetifolia'', is native to tropical Africa and southern India. It is naturalized throughout most of the tropics. The other species are endemic to southern + eastern Africa.Mattias Iwarsson and Yvette Harvey. 2003. "Monograph of the genus ''Leonotis'' (Pers.) R.Br. (Lamiaceae)". ''Kew Bulletin'' 58(3):597-645. ''Leonotis'' was named by Robert Brown in 1810 in Prodromus Florae Novae Hollandiae et Insulae Van Diemen.Robert Brown. 1810. ''Prodromus Florae Novae Holland ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crotalaria Agatiflora
''Crotalaria'' is a genus of flowering plants in the family Fabaceae (subfamily Faboideae) commonly known as rattlepods. The genus includes over 700 species of herbaceous plants and shrubs. Africa is the continent with the majority of ''Crotalaria'' species (approximately 400 species), which are mainly found in damp grassland, especially in floodplains, depressions and along edges of swamps and rivers, but also in deciduous bush land, roadsides and fields. Some species of ''Crotalaria'' are grown as ornamentals. The common name rattlepod or rattlebox is derived from the fact that the seeds become loose in the pod as they mature, and rattle when the pod is shaken. The name derives from the Ancient Greek , meaning "castanet", and is the same root as the name for the rattlesnakes (''Crotalus''). ''Crotalaria'' species are used as food plants by the larvae of some Lepidoptera species including ''Endoclita sericeus'', ''Etiella zinckenella'' and ''Utetheisa ornatrix''. The toxic alkalo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IUCN Red List
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biological species. It uses a set of precise criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. With its strong scientific base, the IUCN Red List is recognized as the most authoritative guide to the status of biological diversity. A series of Regional Red Lists are produced by countries or organizations, which assess the risk of extinction to species within a political management unit. The aim of the IUCN Red List is to convey the urgency of conservation issues to the public and policy makers, as well as help the international community to reduce species extinction. According to IUCN the formally stated goals of the Red List are to provi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Least Concern
A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. They do not qualify as threatened, near threatened, or (before 2001) conservation dependent. Species cannot be assigned the "Least Concern" category unless they have had their population status evaluated. That is, adequate information is needed to make a direct, or indirect, assessment of its risk of extinction based on its distribution or population status. Evaluation Since 2001 the category has had the abbreviation "LC", following the IUCN 2001 Categories & Criteria (version 3.1). Before 2001 "least concern" was a subcategory of the "Lower Risk" category and assigned the code "LR/lc" or lc. Around 20% of least concern taxa (3261 of 15636) in the IUCN database still use the code "LR/lc", which indicates they have not been re-evaluate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Begging Behavior In Animals
Begging in animals is when an animal solicits being given resources by another animal. This is usually a young animal soliciting food from their parents, brood hosts or other adults. However, the resource is sometimes non-food related or may be solicited by adult animals. Begging behavior is most widely studied in birds, however, mammals, amphibians, and invertebrates perform begging displays. Generally in food solicitation, begging behavior is instinctive, although in some instances it is learned (e.g. pet cats and dogs). While the ultimate causation for begging is an increase in the animal's individual fitness, several theories have been proposed for how food begging evolved proximate causes including scramble competition, honest signalling of need, and cooperative begging by siblings. Various types of information such as nutritional status or immunocompetence can be transmitted with auditory and visual begging signals and the behavior can be modulated by several factors such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bronzy Sunbird
The bronzy sunbird (''Nectarinia kilimensis'') is a species of bird in the family Nectariniidae. They are located mostly in parts of southern Africa. Description Bronzy sunbirds have a long, thin, well-curved bill. Males have bronze-and-green undertones but most often look black in light. While the male has the undertones, the female however has a pale eyebrow and an added yellowish park below the belly with fine streaking. On some subspecies specifically located in Angola there is a splash of odd green, but it does not overlap in range with malachite or scarlet-tufted sunbirds in similar areas which do not have this green streaking. Male sunbirds lack any purple tones to the plumage which is found on female species. Vocalizations Bronzy sunbirds use a jumble of twittering notes followed by cleaner whistle sounds. These sounds are most often heard during the early morning and mid day. Distribution and habitat The bronzy sunbird can be found in Africa. While not very com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dominance (ecology)
Ecological dominance is the degree to which one or several species have a major influence controlling the other species in their ecological community (because of their large size, population, productivity, or related factors) or make up more of the biomass. Most ecological communities are defined by their dominant species. *In many examples of wet woodland in western Europe, the dominant tree is alder ('' Alnus glutinosa''). *In temperate bogs, the dominant vegetation is usually species of ''Sphagnum'' moss. *Tidal swamps in the tropics are usually dominated by species of mangrove (''Rhizophoraceae'') *Some sea floor communities are dominated by brittle stars. *Exposed rocky shorelines are dominated by sessile organisms such as barnacles and limpets. See also * National Vegetation Classification, a system for classifying British British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foraging
Foraging is searching for wild food resources. It affects an animal's Fitness (biology), fitness because it plays an important role in an animal's ability to survive and reproduce. Optimal foraging theory, Foraging theory is a branch of behavioral ecology that studies the foraging behavior of animals in response to the environment where the animal lives. Behavioral ecologists use economic models and categories to understand foraging; many of these models are a type of optimal model. Thus foraging theory is discussed in terms of optimizing a payoff from a foraging decision. The payoff for many of these models is the amount of energy an animal receives per unit time, more specifically, the highest ratio of energetic gain to cost while foraging. Foraging theory predicts that the decisions that maximize energy per unit time and thus deliver the highest payoff will be selected for and persist. Key words used to describe foraging behavior include ''resources'', the elements necessary fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Field Research
Field research, field studies, or fieldwork is the collection of raw data outside a laboratory, library, or workplace setting. The approaches and methods used in field research vary across disciplines. For example, biologists who conduct field research may simply observe animals interacting with their environments, whereas social scientists conducting field research may interview or observe people in their natural environments to learn their languages, folklore, and social structures. Field research involves a range of well-defined, although variable, methods: informal interviews, direct observation, participation in the life of the group, collective discussions, analyses of personal documents produced within the group, self-analysis, results from activities undertaken off- or on-line, and life-histories. Although the method generally is characterized as qualitative research, it may (and often does) include quantitative dimensions. History Field research has a long history. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Territorial Behavior
In ethology, territory is the sociographical area that an animal consistently defends against conspecific competition (or, occasionally, against animals of other species) using agonistic behaviors or (less commonly) real physical aggression. Animals that actively defend territories in this way are referred to as being territorial or displaying territorialism. Territoriality is only shown by a minority of species. More commonly, an individual or a group of animals occupies an area that it habitually uses but does not necessarily defend; this is called its home range. The home ranges of different groups of animals often overlap, and in these overlap areas the groups tend to avoid each other rather than seeking to confront and expel each other. Within the home range there may be a ''core area'' that no other individual group uses, but, again, this is as a result of avoidance. Function The ultimate function of animals inhabiting and defending a territory is to increase the indiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phragmanthera Dschallensis
Phragmanthera is a genus of plants in the family Loranthaceae Loranthaceae, commonly known as the showy mistletoes, is a family of flowering plants. It consists of about 75 genera and 1,000 species of woody plants, many of them hemiparasites. The three terrestrial species are ''Nuytsia floribunda'' (the W ..., the showy mistletoes. It is native to Africa and temperate Asia. The genus contains 35 species. References Loranthaceae genera Loranthaceae {{Santalales-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacaranda Mimosifolia
''Jacaranda mimosifolia'' is a sub-tropical tree native to south-central South America that has been widely planted elsewhere because of its attractive and long-lasting violet-colored flowers. It is also known as the jacaranda, blue jacaranda, black poui, Nupur or fern tree. Older sources call it ''J. acutifolia'', but it is nowadays more usually classified as ''J. mimosifolia''. In scientific usage, the name "jacaranda" refers to the genus ''Jacaranda'', which has many other members, but in horticultural and everyday usage, it nearly always means the blue jacaranda. In its native range in the wild, ''J. mimosifolia'' is listed as Vulnerable by the IUCN. Description The tree grows to a height of up to . Its bark is thin and grey-brown, smooth when the tree is young but eventually becoming finely scaly. The twigs are slender and slightly zigzag; they are a light reddish-brown. The flowers are up to long, and are grouped in panicles. They appear in spring and early summer, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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