An IUCN Red List Critically Endangered (CR) species is one that has been categorized by the International Union for Conservation of Nature as facing an extremely high risk of extinction in the wild. As of 2021, of the 120,372 species currently tracked by the IUCN, there are 8,404 species that are considered to be Critically Endangered.
Villa's gray shrew is a shrew native to northeastern Mexico, where it is called musaraña.
Cordulegaster is a genus of dragonfly in the family Cordulegastridae. It contains the following species:
Cordulegaster mzymtae is a species of dragonfly in the family Cordulegastridae. It is found in Georgia and Turkey. Its natural habitat is rivers. It is threatened by habitat loss.
Cordulegaster princeps is a species of dragonfly in the family Cordulegastridae. It is endemic to Morocco. Its natural habitat is rivers. It is threatened by habitat loss.
Cordulegaster sayi, commonly known as Say's spiketail, is a species of dragonfly in the family Cordulegastridae endemic to the United States.
Cordulegaster trinacriae is a species of dragonfly in the family Cordulegastridae. It is endemic to central-southern Italy, from Abruzzo south to Calabria and Sicily, from where it was first described. Its natural habitats are humid forests, rivers, and freshwater springs. It is threatened by habitat loss.
Cordulegaster vanbrinkae is a species of dragonfly in the family Cordulegastridae. It is endemic to Iran and Armenia. Its natural habitat is rivers.
The golden-ringed dragonfly is a large, striking dragonfly and the longest British species, the only member of its genus to be found in the United Kingdom.
Cordulegaster dorsalis is a dragonfly in the family Cordulegastridae.
Cordulegaster diadema, commonly known as the Apache spiketail, is a species of dragonfly in the family Cordulegastridae. The mature adult is usually 74-88 millimeters long. It ranges from southwestern United States to Mexico and Costa Rica. The back of the head is yellow to brown with yellow to black hairs, though some have been reported with a black head with white hairs. The first proximal segment of the legs are yellow. The thorax has two lateral stripes with a yellow stripe between them.
Cordulegaster bidentata, also known as sombre goldenring or two-toothed goldenring, is a species of dragonfly in the family Cordulegastridae.
Cordulegaster maculata, also known as the twin-spotted spiketail, is a dragonfly of the family Cordulegastridae. Its body length varies in size from 2.5 to 3.0 inches. It was described by Edmond de Sélys Longchamps in 1854.
Cordulegaster erronea, the tiger spiketail, is a species of spiketail in the family Cordulegastridae. It is found in North America.
Cordulegaster obliqua, the arrowhead spiketail, is a species of spiketail in the dragonfly family Cordulegastridae. It is found in North America, often in clearings near small rivers and streams. The larvae can be found surviving in streams designated as intermittent, and may live up to 5 years before emerging as an adult in early summer.
Cordulegaster bilineata, the brown spiketail, is a species of spiketail in the dragonfly family Cordulegastridae. It is found in North America.
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