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In North America, the Purple Martin (Progne subis) reaches the northwestern limit of its range in British Columbia. Two subspecies occur in British Columbia. Purple Martins forage aerially for insects. They nest in natural cavities and woodpecker holes in trees and snags, and in holes in buildings. In recent years they have been almost entirely restricted to nestboxes and artificial holes in pilings in estuaries, bays, and harbours. Martins have bred in Vancouver and the Lower Fraser Valley, and eastern Vancouver Island from Sooke to Campbell River, but they are now restricted to six sites on southeast Vancouver Island (Victoria Harbour, Esquimalt Harbour, Cowichan River Estuary, Nanaimo River Estuary, Newcastle Island, and Ladysmith Harbour) and one site (Maplewood Flats) in North Vancouver. There is no evidence of breeding by Purple Martins in northeastern British Columbia, despite numerous published range maps indicating that they breed there. The martin’s British Columbia population was reduced to fewer t
Fraser, D.F., Siddle, C.; Copley, D.; Walters, E.. 1997. Status of the Purple Martin in British Columbia. Ministry of Environment, Lands and Parks. Species Status Report. WR89
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