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 local population

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 local population

Creatures at Tama Zoo

Long-clawed Shrew
Sorex unguiculatus

It is not a mouse but is more closely related to a mole. It is the largest shrew in Japan. It moves by burrowing through areas where fallen leaves have piled up and vegetation is lush, and sometimes it lives by digging tunnels from the humus layer to the ground using its well-developed front legs. It has a territory and lives alone. It has a high metabolic rate and feeds at regular times regardless of day or night.

classification	Mammalia, Order Soricidae, Family Soricidae
English name	Long-clawed Shrew
distribution	Russian Far East, Northeastern China, Korean Peninsula, Japan (Hokkaido)
Residence	Grasslands, wetlands, shrublands
Size	頭胴長：54～97mm 尾長：40～53mm 体重：6.0～19.3g
food	Earthworms, insects, spiders, etc.
Red List	IUCN: LC (Least Concern)

Tama Zoo exhibition area

Tama Zoo and Asian Zone

Breeding efforts for shrews at Tama Zoo

In 2007, Hama-naka Town in Akkeshi County, Hokkaido, and Tama Zoo signed a partnership agreement with the aim of elucidating the physiology and ecology of the shrews that live in the town, as well as protecting and raising awareness of their habitat. We are currently working to elucidate the breeding ecology of Long-clawed Shrew and Eurasian Least Shrew which were collected on Kenbokki Island.