November 24, 1980 – The U.S. Fish and Wildlife Service received a petition from the International Council for Bird Preservation to list the Magenta petrel as an endangered species.
May 12, 1981 – The Service made a positive 90-day finding on the petition.
January 20, 1984 – The Service published a 12-month finding on the 1980 petition determining that the Magenta petrel warranted listing but that protection was precluded by higher listing priorities.
May 10, 1985 through November 21, 1991 – The Service published five annual notices continuing to find that the species warranted listing but that listing was precluded due to other priorities.
2003 – The Center sued the Service over its delay in issuing proposed listing rules for 73 rare foreign birds in need of protection, including the Magenta petrel.
May 21, 2004 – The Service published another annual notice continuing to find that the petrel warranted listing but protection was precluded due to other priorities.
April 23, 2007 – The Service published an annual notice finding that the species warranted listing.
December 18, 2007 – The Fish and Wildlife Service proposed to list the Magenta petrel as an endangered species under the federal Endangered Species Act.
June 16, 2009 – The Center and the Service reached a settlement agreement through which the agency agreed to submit to the Federal Register a final determination on listing the species.
September 14, 2009 – The Service issued a final rule listing the Magenta petrel as endangered throughout its range under the federal Endangered Species Act.