Threatened species are any species which are vulnerable to extinction in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of critical depensation, a mathematical measure of biomass related to population growth rate. This quantitative metric is one method of evaluating the degree of endangerment.
The Australian golden whistler or golden whistler, is a species of bird found in forest, woodland, mallee, mangrove and scrub in Australia. Most populations are resident, but some in south-eastern Australia migrate north during the winter. Its taxonomy is highly complex and remains a matter of dispute, with some authorities including as many as 59 subspecies of the golden whistler, while others treat several of these as separate species.
The stubble quail is a native Australian species which is the most common quail species in Australia. The species is not under any threat of extinction. Stubble quail are widespread and found throughout all states and territories of Australia excluding Tasmania. Other common names include grey quail and pectoral quail.
The fiery-necked nightjar is a species of nightjar in the family Caprimulgidae, which is found mostly in Africa south of the equator, though it has been spotted in a few countries north of the equator. It is most often found in woodland savannas or other deciduous woodlands. It is usually distinguished by its tawny coloured collar which gives the species its common name. It has a distinctive call that many have rendered as 'good-lord-deliver-us'. The fiery-necked nightjar is an insectivorous species that mostly eats butterflies, moths and other insects. The fiery-necked nightjar breeds after the dry season and typically produce two clutches with two eggs per clutch.
Lewin's rail is a species of bird in the family Rallidae. It is also known as the water rail, Lewin's water rail, Lewin's grind rail, slate-breasted rail, slate-breasted water rail, pectoral rail, pectoral water rail, short-toed rail and short-toed water rail.
The scrubtit is a species of bird in the thornbill family Acanthizidae. It is endemic to Tasmania and King Island in Australia. Its natural habitat is the temperate rainforest, Nothofagus beech forest and eucalypt woodland. It is a small species that resembles the Sericornis scrubwrens.
The southern whiteface is a small passerine found in arid regions across most of the southern half of the Australian continent, excluding Tasmania. Superficially finch-like in appearance, this insectivorous bird is relatively common throughout most of its range, however, overall populations appear to be in decline.
Aphelocephala is a genus of bird in the thornbill family Acanthizidae. The three species are collectively known as whitefaces. They are endemic to Australia, generally occurring in the arid centre of the continent. They are a striking looking bird, particularly compared to their duller looking relatives, having dark upperparts and white breasts and faces. Two species, the chestnut-breasted and banded whitefaces, break up the white undersides with a darker band. The three species have stubby bills and unlike the rest of the Acanthizidae they consume large numbers of seeds in their diet.
The banded whiteface is a species of bird in the family Acanthizidae. It is endemic to dryer regions of Australia.
The white-breasted cuckooshrike is a species of bird in the family Campephagidae. It is found in Angola, Benin, Botswana, Burkina Faso, Burundi, Cameroon, Central African Republic, Democratic Republic of the Congo, Ivory Coast, Eswatini, Ethiopia, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Malawi, Mali, Mauritania, Mozambique, Namibia, Nigeria, Rwanda, Senegal, Sierra Leone, South Africa, Sudan, Tanzania, Togo, Uganda, Zambia, and Zimbabwe. Its natural habitats are subtropical or tropical dry forest and dry savanna.
The chestnut-bellied euphonia is a species of bird in the family Fringillidae. It was formerly placed with the related Thraupidae. It is found in Argentina, Brazil, and Paraguay. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest.
The greater necklaced laughingthrush is a species of passerine bird in the family Leiothrichidae. It is found in Bangladesh, Bhutan, China, India, Laos, Myanmar, Nepal, Thailand and Vietnam. It is introduced to the United States. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest.
The pectoral antwren is a species of bird in the family Thamnophilidae. It is endemic to north east Brazil. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical moist lowland forests. It is locally common within its range, but has a highly fragmented distribution. It is threatened by habitat loss.
The ashy-headed greenlet is a species of bird in the family Vireonidae. It is found in Bolivia, Brazil, French Guiana, Guyana, Peru, Suriname, and Venezuela. Its natural habitats are subtropical or tropical dry forests, subtropical or tropical moist lowland forests, subtropical or tropical mangrove forests, and heavily degraded former forest.
The spot-breasted oriole is a species of bird in the family Icteridae.
The bearded tachuri is a species of bird in the family Tyrannidae.
The brown-flanked tanager is a species of bird in the family Thraupidae. It is endemic to Peru.
Ctenochromis pectoralis, the Pangani haplo, is a species of fish in the family Cichlidae. It was originally characterized in the Pangani River of Tanzania, and may also be present in Kenya. It is listed as extinct by IUCN as a result of a 1996 evaluation, but this appears to be incorrect. A more recent IUCN publication stated that this species is not endangered in any way.
Acanthizidae—sometimes called Australian warblers—are a family of passerine birds which includes gerygones, thornbills Acanthiza, and scrubwrens Sericornis. The family Acanthizidae consists of small to medium passerine birds, with a total length varying between 8 and 19 centimetres. They have short rounded wings, slender bills, long legs, and a short tail. Most species have olive, grey, or brown plumage, although some have patches of a brighter yellow. The weebill is the smallest species of acanthizid, and the smallest Australian passerine; the largest is the pilotbird.
The Rennell whistler is a species of bird in the family Pachycephalidae, which is endemic to the Rennell Island in the Solomon Islands. It was split from the Bismarck whistler by the IOC in 2016.
