Data Sources
Our species database draws from the following authoritative sources:
- International Union for Conservation of Nature (IUCN) — Conservation status classifications and population assessments
- World Wildlife Fund (WWF) — Species data, habitat mapping, and threat analysis
- National Park Service (NPS) — Biodiversity surveys across US national parks
- Smithsonian Institution — Taxonomic data and species classification
- National Geographic — Geographic distribution and behavioral data
Data Processing
Raw data is normalized, deduplicated, and cross-referenced. Physical measurements (weight, height, speed) are standardized to metric units. Conservation status follows the IUCN Red List categories: Least Concern (LC), Near Threatened (NT), Vulnerable (VU), Endangered (EN), Critically Endangered (CR), and Extinct (EX).
Metric Definitions
- Weight (kg) — Typical adult body mass range
- Lifespan (years) — Average lifespan in wild conditions
- Top Speed (km/h) — Maximum recorded sprint speed
- Gestation Period (days) — Duration from conception to birth
- Offspring per Birth — Typical litter or clutch size
Qualitative Labels
When comparing species metrics to global averages, we use threshold-based labels derived from quartile analysis: “exceptionally high” (≥2× average), “well above average” (1.5–2×), “above average” (1.15–1.5×), “near average” (0.85–1.15×), and corresponding below-average labels.
Update Frequency
Our database is reviewed and updated weekly. Major IUCN Red List reassessments are incorporated within 48 hours of publication.