Seabirds and colonial waterbirds of the Magdalen Islands : statuses and population trends / Jean-François Rail.: CW69-5/502E-PDF

"This survey of breeding seabirds in 2007 updates the work done by Mousseau et al. (1976), Bourque and Richard (1992), and by the Canadian Wildlife Service (CWS) in 2000-2002, and was a collaborative effort between the CWS and Parks Canada. During an aerial survey that took place on June 9, photographs were taken of breeding colonies that were inaccessible or difficult to census by boat. The remainder of the colonies were visited either by boat or by foot, between June 8 and 22. The size of all colonies of breeding seabirds, plus the Great Blue Heron, were estimated, with the exception of the Northern Gannet which is censused during a specific survey every five years (next due in 2009). Census methods that were used are provided in detail for each site and species. For each species, the current status of the breeding population is discussed and comparisons are made with previous surveys, as well as with historical data, to determine local population trends"--Abstract, p. iii.

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