# Endangered and Threatened Wildlife and Plants; Threatened Species Status for the Elfin-Woods Warbler With 4(d) Rule
> **US Fish and Wildlife Service** · Final rule. · Published 2016-06-22 · Effective 2016-07-22 · 81 FR 40534
## Document
- **Document number:** 2016-14540
- **Category:** endangered-species
- **Sub-agency:** US Fish and Wildlife Service
- **Federal Register citation:** 81 FR 40534
- **CFR reference:** 50 CFR 17
- **Publication date:** 2016-06-22
- **Effective date:** 2016-07-22
- **Interior docket:** Docket No. FWS-R4-ES-2015-0144
## Abstract

We, the U.S. Fish and Wildlife Service (Service), determine threatened species status under the Endangered Species Act (Act), as amended, for the elfin-woods warbler (Setophaga angelae), a bird species in Puerto Rico. This rule will add this species to the List of Endangered and Threatened Wildlife. We are also adopting a rule under the authority of section 4(d) of the Act (a "4(d) rule") that is necessary and advisable to provide for the conservation of the elfin- woods warbler.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/06/22/2016-14540/endangered-and-threatened-wildlife-and-plants-threatened-species-status-for-the-elfin-woods-warbler)
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