3/24/25- MrNussbaum.com is perfect for teachers, homeschooling parents, and most of all students. It's ONLY $29 per year. No student limits. Unlock all content, eliminate ads, and gain access to 12,000 engaging and interactive resources in all subject areas for grades K-8. CREATED by a TEACHER and serving millions of students.

Remove ad

Home > Endangered Species > IUCN Classification System Guide

IUCN Classification System Guide

This section defines the different classifications used by the IUCN to describe an animal's status including extinct, critically endangered, endangered, vulnerable, and more. This section also provides pictures and animals which fit into each classification.