Action timeline

2005 – A federal court ruled that an earlier withdrawal of a proposed listing rule for the lizard — made by the Service in 2001 — violated the Endangered Species Act; the U.S. Fish and Wildlife Service was ordered to restore the proposed listing.

October 30, 2003 – The Center filed a lawsuit challenging the Service’s 2001 withdrawal of its proposal to list the lizard.

2006 – The Service withdrew a listing proposal that had been ordered to be restored the previous year. The Center challenged that decision in court.

2007 – The court upheld the Service's 2007 withdrawal of a proposal to list the flat-tailed horned lizard under the Endangered Species Act. The Center appealed that decision.

May 18, 2009 – The Ninth Circuit Appeals Court ruled that the Service’s decision to  deny the lizard protection was illegal and ordered the agency to consider listing the species.

November 4, 2009 – A federal district court ruled to reinstate the proposal to list the flat-tailed horned lizard under the Endangered Species Act.