METRIC · COLONY HEALTH
Overwinter Survival (OWS)
Share of colonies that survive the dormant season, the canonical annual measure of regional apiary resilience.
Colony HealthUnit: %Monthly
Formula
Colonies alive at spring inspection ÷ colonies entering winter, per apiary cohort.
Thresholds & Bands
| Band | Range | State |
|---|---|---|
| Strong | ≥ 85 | ok |
| Moderate | 70-85 | warn |
| Poor | < 70 | crit |