Zoo Stock Species and the Red List
Zoo Stock Species and the Red List
Zoo Stock
This indicates that the species is included in the Second Zoo Stock Plan, which was formulated by the Tokyo Metropolitan Government in 2018. The plan sets goals for the next 10 years in three areas: "species conservation," "contribution to wildlife conservation," and "environmental education and conservation awareness." 124 animal species are included.
What is the Red List?
Based on scientific research, this is a list of wildlife classified by rank (category) indicating the degree of risk of extinction.
Livng Things Encyclopedia shows the categories (mainland and islands) assessed by the IUCN (International Union for Conservation of Nature) at the global level, the Ministry of the Environment for Japan, and the Tokyo Metropolitan Government for Tokyo.
The higher the category in each table, the higher the risk of extinction, and CR, EN, and VU are the three categories known as "endangered species." In Tokyo, species that are not at the NT (near threatened) level but are relatively rare are considered "species of concern."
|
IUCN categories |
|
|---|---|
|
EX |
extinction |
|
EW |
Extinction in the wild |
|
CR+EN |
— |
|
CR |
Serious crisis |
|
EN |
crisis |
|
VU |
emergency |
|
NT |
Near Threatened |
|
LC・○ |
Low Concern |
|
DD |
Data shortage |
|
LP |
— |
|
Japan (Ministry of the Environment) Category |
|
|---|---|
|
EX |
extinction |
|
EW |
Extinction in the wild |
|
CR+EN |
Endangered species |
|
CR |
Critically Endangered |
|
EN |
Endangered species |
|
VU |
Endangered species |
|
NT |
Near Threatened |
|
LC・○ |
— |
|
DD |
Lack of information |
|
LP |
Endangered |
|
Tokyo Category |
|
|---|---|
|
EX |
extinction |
|
EW |
Extinction in the wild |
|
CR+EN |
Endangered species |
|
CR |
Critically Endangered |
|
EN |
Endangered species |
|
VU |
Endangered species |
|
NT |
Near Threatened |
|
LC・○ |
Unranked |
|
DD |
Lack of information |
|
LP |
Endangered |
Creatures at Tama Zoo
Creatures at Tama Zoo
Diving Beetle
Cybister japonicus
Diving Beetle
Cybister japonicus
They live in ponds, swamps, rice fields and slow-flowing rivers, feeding on insects and dead frogs. They swim skillfully using their hind legs. Underwater, they store air under their elytra and use it for breathing. The larvae have sharp jaws that allow them to catch insects and small fish and suck out their juices. The eggs are about 12 mm long and are laid inside the stems of plants. The male has suckers on his front legs that he uses to grab onto the backs of females.
| classification | Insecta, Coleoptera, Diving Beetle |
|---|---|
| English name | Diving Beetle |
| distribution | Japan (Hokkaido, Honshu, Shikoku, Kyushu, Tsushima), Korean Peninsula, China, Taiwan, Russian Far East |
| Residence | Ponds, swamps, rice fields and slow-flowing rivers |
| Size |
Body length: 34-42mm
|
| food | Adults: Insects, dead frogs, etc. |
| Red List |
IUCN: Not rated
Japan: VU (Vulnerable) Tokyo: EX (Extinct) |