Question

As per IUCN Red List categories and criteria, one of the following category does not included under Extinction Risk? ______________

• A. Extinct
• B. Data Deficient
• C. Critically endangered
• D. Vulnerable

Hint:

The formal "Threatened" group only includes: CR, EN, and VU. "Data Deficient" means "We need more information."

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The IUCN Red List categorizes species based on their risk of going extinct. The question asks to identify the category that does *not* imply a known risk level.

Step 2: Detailed Explanation:

• Threatened Categories: Species at "risk" of extinction are formally placed in three categories:
- Critically Endangered (CR): Extremely high risk.
- Endangered (EN): Very high risk.
- Vulnerable (VU): High risk.

• Extinct (EX): This means the risk has already been realized—the species no longer exists.

• Data Deficient (DD): This is a category for species where there is inadequate information to make a direct, or indirect, assessment of its risk of extinction based on distribution and/or population status. A species in this category is *not* formally listed as being at risk because we simply don't know enough to classify it.

• Importance: "Data Deficient" is a call for more research; it's a "neutral" status regarding threat levels.

Step 3: Final Answer:
Data Deficient is not included as a specific category of "Extinction Risk."