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Hypsipetes is a genus of bulbuls, songbirds in the family Pycnonotidae. Most of its species occur in tropical forests around the Indian Ocean. But while the genus is quite diverse in the Madagascar region at the western end of its range it does not reach the African mainland.
It is the type species of the genus Hypsipetes, established by Nicholas Aylward Vigors in the early 1830s. [2] There are a number of subspecies , mostly varying in the shade of the body plumage which ranges from grey to black, and some also occur in white-headed morphs , as also suggested by its specific epithet leucocephalus , literally "white ...
This was a replacement name for Ixocincla virescens Blyth 1845 which was preoccupied in Hypsipetes by Ixos virescens Temminck, 1825, the Javan bulbul. [2] [3] [4] The Nicobar bulbul was formerly usually placed in the genus Ixos but was moved to Hypsipetes based on a molecular phylogenetic study published in 2024. [5]
The Sangihe golden bulbul (Hypsipetes platenae) is a species of passerine bird in the bulbul family Pycnonotidae. It is endemic to the Sangihe Islands which lie northeast of Sulawesi in Indonesia. Its natural habitat is subtropical or tropical moist lowland forests .
Character displacement occurs when similar species that live in the same geographical region and occupy similar niches differentiate in order to minimize niche overlap and avoid competitive exclusion. Several species of Galapagos finches display character displacement. Each closely related species differs in beak size and beak depth, allowing ...
This is a case of automimicry; [11] the model is the same species as its mimic. Equivalent to Batesian mimicry within a single species, it occurs when there is a palatability spectrum within a population of harmful prey. For example, monarch (Danaus plexippus) caterpillars feed on milkweed species of varying toxicity. Some feed on more toxic ...
Subadult male lion and female spotted hyena in the Masai Mara.The two species share the same ecological niche, and are thus in competition with each other. Interspecific competition, in ecology, is a form of competition in which individuals of different species compete for the same resources in an ecosystem (e.g. food or living space).
Plesiomorphy, symplesiomorphy, apomorphy, and synapomorphy, all mean a trait shared between species because they share an ancestral species. [a] Apomorphic and synapomorphic characteristics convey much information about evolutionary clades and can be used to define taxa. However, plesiomorphic and symplesiomorphic characteristics cannot.