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 Ueno Zoo

Daruma Pond Frog
Pelophylax porosus porosus

Subspecies: Tokyo Daruma Pond Frog

This medium-sized frog lives near rice paddies and shallow ponds. Although its name includes "Tokyo," it is found not only in the Kanto region, but also in the Sendai Plain and parts of Nagano and Niigata prefectures. A subspecies of this species is the Nagoya Daruma Pond Frog, which is found in the Chubu and Seto Inland Sea regions. Its close relative, the Niigata pond frog, is not found in the Kanto region, and this species is sometimes called the "Lord's Frog."

classification	Amphibians, Anura, Ranidae
English name	Tokyo Daruma Pond Frog
distribution	From the Sendai Plain to the Kanto region, central and southern Niigata Prefecture, and northern and central Nagano Prefecture
Residence	Flat land (such as irrigation channels for rice fields)
Size	Total length: Male 39-75mm, Female 43-87mm
food	Larvae: Omnivorous, eating algae, detritus, animal carcasses, etc. After metamorphosis: Eats spiders, insects, and other animals
Red List	IUCN: LC (Least Concern) Japan: NT (Near Threatened)

Ueno Zoo exhibition area

Ueno Zoo-Vivarium

Webbed hind feet

They have well-developed webbing between the toes on their hind feet, allowing them to swim relatively quickly in the water, but they do not have suckers on the tips of their toes, making them less adept at climbing grass or walls.

Paddy fields and Daruma Pond Frog

Their numbers are declining due to factors such as the decline in rice paddies, which are their habitats and breeding grounds. In addition, as more and more frogs have been built in rice paddies, there are more and more cases of frogs falling into the drains and drowning because they cannot climb up the walls.

Return to Livng Things Encyclopedia