olive-sided flycatcher, credit: Fred Hochstaedter CC BY-NC 2.0

Special Concern Provincially, Threatened Nationally


• Medium-sized songbird with deep brownish olive-grey feathers along sides and back
• Perches conspicuously at top of tall trees
• Has a loud, three note whistle that sounds like “quick, three beers”


• Breeds in every province and territory except Nunavut
• In Ontario, widely distributed throughout the central and northern areas


• Habitat loss and degradation
• Decline in insect prey


• Federally protected under the Species at Risk Act, 2002 and under the Migratory Birds Convention Act, 1994
• Not protected under the Endangered Species Act, 2007


The olive-sided flycatcher has experienced a widespread and constant decline since 1960, with a 79 percent loss from 1968 to 2006.