# Migratory Bird Permits; Definition of “Hybrid” Migratory Bird
> **US Fish and Wildlife Service** · Final rule. · Published 2013-11-01 · Effective 2013-12-02 · 78 FR 65576
## Document
- **Document number:** 2013-26069
- **Category:** migratory-bird
- **Sub-agency:** US Fish and Wildlife Service
- **Federal Register citation:** 78 FR 65576
- **CFR reference:** 50 CFR 21
- **Publication date:** 2013-11-01
- **Effective date:** 2013-12-02
- **Interior docket:** Docket No. FWS-R9-MB-2011-0060
## Abstract

We, the U.S. Fish and Wildlife Service (FWS), revise the definition of "hybrid" as it relates to birds protected under the Migratory Bird Treaty Act. We revise the definition to make it clear that it applies to all offspring of any species listed at 50 CFR 10.13.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/11/01/2013-26069/migratory-bird-permits-definition-of-hybrid-migratory-bird)
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