Let’s look at the security categories in more detail.

EX (extinct). The status is assigned to a species or subspecies that does not occur in nature since the last officially recorded observation. If the last representative dies, the species is considered extinct. Unfortunately, the list of species with this status is quite long. This includes the white-billed woodpecker, dodo, moa, heath grouse, and many others.

EW (Extinct in the Wild). This status is assigned to taxa that have survived only in captivity. It is the last step before the critical line. The category includes the blue ara, David’s deer, Saharan oryx, etc.

CR (critically endangered, or endangered). The highest conservation category given to species that have survived in the wild. The main criterion is an 80% reduction in numbers within three generations. This conservation status is assigned to the Amur leopard, Hawaiian monk seal, black rhinoceros, and saiga.

EN (endangered or endangered species). This conservation status is assigned to those species and subspecies whose numbers are critically low and whose range is declining. This includes the Iranian doe, anoa, myriks, spectacled penguin, and hyacinth ara.

VU (Vulnerable). This category includes species that may be in danger of extinction in the near future. If in the last three generations the number of species has decreased by 30%, they are assigned this conservation status. This includes the Lesser Panda, the Crane of Paradise, the Polar Bear, the Mandrill, and many others.

NT (near vulnerable status). Currently, species or subspecies that have this conservation status are not on the brink of extinction, but they may be threatened in the near future. The narwhals, gray pelicans, and tomato-nose sloths have this status in the Red List of the World.

LC (least threatened). The most optimistic protection status. At the moment these taxa are almost nothing threatened. But local populations or their range may be declining. These include the koala, bullfrog, little bittern, satinback jackrabbit, and many others.

DD (insufficient data)

NE (threat not assessed).

In an essay about a particular species you can learn its systematic position, current conservation status, read a description of its appearance, lifestyle and biology, as well as some interesting facts.