Concept:The Red Data Book is a record of species that are at risk of extinction.
Explanation:It mainly contains data on endangered flora and fauna.
The International Union for Conservation of Nature (IUCN) maintains this book.
It was first published in 1964.
It helps estimate the population status of different species.
It also evaluates the risk of endangerment of a species.
This information supports conservation planning.
Species are categorised using colour codes, such as red for critically endangered, orange for endangered, amber for vulnerable, and black for extinct.
Answer:Endangered species