Chaetura pelagica breeds in eastern North America as far north as southern Canada, and occasionally in California and Arizona (USA). It is a migratory species, wintering in eastern Ecuador, Peru, north-west Brazil and northern Chile1. The Canadian population, which occupies one quarter of the breeding range, is estimated at just 11,820 breeding individuals3, although the global population has been estimated at 15,000,000 individuals6. Trends have been recorded through North America between 1966 and 2007, with a decline of 5.5% per year in Canada (total decline of 90%) and 1.8% per year in the USA (total decline of 53%). Overall, during this period the population has declined by 1.9% per year, though this decline has accelerated in recent years, reaching a decline of 2.8% per year between 1980 and 20085 (total decline of 40% over this period)4.
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