# Endangered and Threatened Wildlife and Plants; Reclassification of the Hawaiian Stilt (Kukuluae'o or Ae'o) From Endangered to Threatened With a Section 4(d) Rule

**Action Urgency Score:** 30/100

| Field | Value |
|---|---|
| Agency | Interior Department; Fish and Wildlife Service |
| Type | Final rule |
| Action | Final rule. |
| Published | 2026-07-20 |
| Effective | 2026-08-19 |
| Significant | No |
| CFR parts | 50 CFR 17 |
| Summary | We, the U.S. Fish and Wildlife Service (Service), are reclassifying the Hawaiian stilt (kukuluae[revaps]o or ae[revaps]o, Himantopus mexicanus knudseni; a subspecies of the black-necked stilt (Himantopus mexicanus)) from endangered to threatened (downlist) under the Endangered Species Act of 1973, as amended (Act). This action is based on our evaluation of the best scientific and commercial data available, which indicates that the subspecies' status has improved such that it is not in danger of extinction throughout all or a significant portion of its range, but that it is still likely to beco |
| Document number | 2026-14550 |

## Why this score
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/07/20/2026-14550/endangered-and-threatened-wildlife-and-plants-reclassification-of-the-hawaiian-stilt-kukuluaeo-or). Last refreshed: 2026-11-04T21:40:49.974Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.