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

Snow Goose
Anser caerulescens

There are two types: a white type that is completely white, and a blue type that has a black body and a white head. Breeding begins in June, and they build nests on the ground made of moss and feathers and lay 4 to 5 eggs at a time. It is said that nesting near Snowy Owl 's nest reduces predation and increases the nesting success rate.

classification	Aves, Anseriformes, Anatidae
English name	Snow Goose
distribution	Breeding locations: Northern Canada, Alaska, and eastern Russia Wintering areas: Southern United States, Mexico, Japan
Residence	Breeding season: Tundra Wintering season: freshwater or saltwater lakes and marshes, agricultural land
Size	全長：66～84cm 翼開長：132～165cm 体重：2.5～3.3kg
food	Grass blades, stems, roots, seeds, aquatic plants, grains
Red List	IUCN: LC (Least Concern) Japan: VU (Vulnerable)

Tama Zoo exhibition area

Tama Zoo and Asian Zone

Situation in the wild

Before the 1990s, this bird was commonly seen in Japan. However, because it was a game bird, its numbers had drastically decreased by the 1990s, and it now migrates to Japan as a rare winter bird, with only a few birds migrating to Hokkaido and the Tohoku region each year. In order to restore the population, efforts were made to release Snow Goose and have flocks of Greater White-fronted Goose in northeastern Siberia incubate Snow Goose eggs. Currently, the bird has recovered to the point where flocks of several thousand birds migrate to Japan.