Question

1. Briefly define each of the nine categories in Figure 1.

Extinct (EX)-

Extinct in the wild-

Critically endangered-

Endangered-

Vulnerable-

Near Threaten-

Least Concern-

Date Deficient

Not elavated-

2. What are the five criteria used to decide if a species belongs on the IUCN Red List (i.e., briefly describe Criteria A-E).
3. How many species are in the IUCN database? Find exact number. Use the search function at https://www.iucnredlist.org/search
4. What three countries have the greatest number of threatened species (CR, EN, VU)? To answer this, go to https://www.iucnredlist.org/resources/summary-statistics open Table 5. For those top three countries, hypothesize why they might have so many species on the list.
5. Think hard about this question: what kinds of biases are there in the species listed in the IUCN list? You can easily find the answer to this by spending time on the IUCN website.

Answer 1

Extinct species:- those species whose no living member is present either in wild or in captivity.

Extinct in wild :-it is the one that has been categoried by international union for conservation of naturel as known only by living member kept in captivity.

Critically endengered :- it is the one that has been categoried by international union for conservation of nature as facing extreme risk of Extinction in the wild.

Endengered:-a species present in such a small no.that is danger of been extinct.

Vulnerable :-it is the species that international union for conservation of nature has declared to likely become endengered if circumstances that have threatening to it's survival and reproduction has been improved.

Near threaten:- the species which are vulnerable to endergerment in near future.

Least concern :-it has been categoried by iucn as elevated but not qualified for any of other categories.

Date deficient:-it has been categoried by iucn as offering insufficient information for proper assessment of conservation sate to be made.