NPSpecies

Individual observed 20 August 2001 at Passage Island boat cove; another on 10 June 2005 at Passage Lighthouse diving on migratory songbirds (A. Egan, pers. comm., August 2005). Four records, all during May of 1983, 1987, 1987, and 1988 (Van Buskirk and Smith 1994). Last positive sighting in the early 1970's (Johnsson, Shelton, and Jordan 1982).; Data Source: A. Egan, pers. comm., August 2005. Van Buskirk and Smith 1994. Janke, Peterson, Peterson, and Lindsay 1994. Johnsson, Shelton, and Jordan 1982. Stauber 1963.

Park is within migration range (Sibley 2000).; Data Source: Sibley 2000. Krefting, Lee, Shelton, and Gilbert 1966.

Rare spring migrant (Van Buskirk and Smith 1994). Rare (Janke, Peterson, Peterson, and Lindsay 1994).; Data Source: Van Buskirk and Smith 1994. Janke, Peterson, Peterson, and Lindsay 1994.

Park Species Detail: Reintroduction attempts were conducted from 1988-1991 on Isle Royale using hack boxes and attendants to feed the chicks. To date (2000), no nesting has resulted from the introduction program (? source)., Park Species Data Source: A. Egan, pers. comm., August 2005. Sibley 2000. Van Buskirk and Smith 1994. Janke, Peterson, Peterson, and Lindsay 1994. Johnsson, Shelton, and Jordan 1982. Krefting, Lee, Shelton, and Gilbert 1966. Stauber 1963.