Taken directly from Law Enforcement Report # 2009703127 — Dept of the Interior, USFWS Office of Law Enforcement
From Sept 26, 2008 – October 6, 2008 the United States Fish and Wildlife Service (USFWS), Alaska Maritime National Wildlife Refuge (AMNWR), partnering with The Nature Conservancy (TNC) and Island Conservation (IC) conducted an invasive rat eradication on Rat Island, located in the Aleutian Islands. The eradication method was an aerial broadcast of Brodifacoum, an extremely toxic and persistent poison, over the entire island. The following year survey crews found over 400 dead birds on Rat Island, including at least forty-four (44) eagles. Twenty-six (26) of the bird’s livers were tested for toxins and all but one came back positive for Brodifacoum, most at extremely high levels.
You can find a copy of the entire law enforcement report here.