Key counts at a glance
Across global assessments tracked into 2025, more than 150,000 species have been evaluated for their risk of extinction. Of these, roughly 43,000 are listed as threatened on the IUCN Red List, meaning they face a high risk of extinction in the wild. Approximately 9,700 are categorized as Critically Endangered, the highest risk level, indicating they are facing an extremely high risk of extinction in the immediate future.
These figures reflect cumulative scientific assessments and updated listings rather than a single yearly snapshot. The counts include animals, plants, fungi, and other groups where data exist. The following sections explain how these categories are defined, which groups are best documented, and how to interpret the numbers responsibly.
What counts as an endangered species
In everyday usage, "endangered" can refer to any species at risk of decline. In formal conservation assessment, the term is used more precisely. The IUCN Red List categorizes species into distinct risk levels based on criteria such as population size, trends, geographic range, and the severity of threats.
Threatened versus endangered
Within the IUCN framework, the term "Threatened" encompasses three categories: Critically Endangered, Endangered, and Vulnerable. "Endangered" specifically refers to species facing a very high risk of extinction in the wild. Comparatively, "Critically Endangered" species face an extremely high risk in the short term, while "Vulnerable" species are at a high risk but not yet meeting the thresholds for Endangered.
IUCN Red List categories most relevant to 'endangered'
- Critically Endangered: extremely high risk of extinction in the wild
- Endangered: very high risk of extinction in the wild
- Vulnerable: high risk of extinction in the wild
- Near Threatened: close to qualifying for a threatened category
Note that "endangered" in common reporting may include species listed as Vulnerable, Endangered, or Critically Endangered, depending on context. For clarity, this overview focuses primarily on species assessed as Endangered or Critically Endangered by IUCN standards.
How many endangered species are documented in 2025
The most widely referenced source for global species risk status is the IUCN Red List. Data compiled by the IUCN and published through their updated summaries provide the basis for current 2025 assessments. The following table captures the principal verified counts across major taxonomic groups as reflected in recent IUCN summaries carried forward into 2025.
| Taxonomic group | Total assessed species | Threatened species (CR + EN + VU) | Critically Endangered (CR) | Endangered (EN) | Vulnerable (VU) | Primary data year range |
|---|---|---|---|---|---|---|
| Amphibians | ~8,000 | ~3,100 | ~940 | ~760 | ~1,400 | 2018–2024 |
| Birds | ~11,000 | ~1,400 | ~230 | ~460 | ~690 | 2015–2024 |
| Mammals | ~6,500 | ~1,200 | ~190 | ~310 | ~680 | 2005–2024 |
| Reptiles | ~12,000 | ~1,500 | ~260 | ~410 | ~810 | 2000–2024 | ]
| Conifers | ~1,100 | ~320 | ~80 | ~110 | ~80 | 2012–2024 |
| Selected invertebrates* | ~1,800 | ~560 | ~90 | ~190 | ~230 | 2000–2024 |
*Selected invertebrates include butterflies, beetles, and other well-studied groups with sufficient data. Total assessed species and threatened numbers across all groups are approximate and vary by update cycle.
As of the most recent comprehensive IUCN summaries integrated into 2025 reporting, approximately 43,000 species are classified as threatened (Critically Endangered, Endangered, or Vulnerable). Roughly 9,700 are listed as Critically Endangered, and a substantial additional portion are Endangered. These totals encompass taxa with completed regional and global assessments and do not include Data Deficient species, for which uncertainty about status is significant.
Data sources and assessment methodology
The IUCN Red List is the global standard for species risk status. Regional Red Lists, maintained by governments and organizations, inform or align with the global framework, contributing localized data on population trends and threats. Assessments rely on peer-reviewed science, field observations, and population surveys, applying standardized criteria that consider trends in population size, geographic distribution, and severity of threats.
Assessments are updated periodically as new surveys, monitoring data, and taxonomic research emerge. Consequently, counts of threatened species evolve over time, and year-to-year changes can reflect improved knowledge as much as real population trends.
Limitations and how to interpret the numbers
Reported counts depend heavily on which taxa have been assessed and the geographic coverage of those assessments. Well-studied groups, such as birds and mammals, have near-complete global evaluations, whereas many plants, invertebrates, and fungi remain poorly documented. Additionally, "Data Deficient" species are not included in threatened totals, even if they may be at risk.
When interpreting how many endangered species there are in 2025, focus on trends over time and the proportion of assessed species that are threatened within each group, rather than absolute counts that may change with future assessments.
Conservation context and next steps
Understanding which species are endangered informs conservation priorities, habitat protection, and recovery actions. High-risk categories such as Critically Endangered often receive targeted interventions, including captive breeding, site protection, and threat reduction. Continued assessment and monitoring help track the effectiveness of these measures and guide future efforts.
For the most reliable current status, consult the official IUCN Red List and related regional authoritative sources, which provide taxonomic details, population estimates, and conservation measures specific to each species.
This overview synthesizes established assessment frameworks and verified figures maintained into 2025, offering a durable reference for understanding global species risk in the near term and beyond.