'In Canada, window strikes alone kill 16 to 42 million birds annually. Feral cats have a significant role to play in bird kills, with some estimates being as high as 59 per cent of kills by cats. Other factors such as automobile collisions, agricultural pesticides, agricultural mowing of ground nesting birds, and commercial forestry practices (destroying nests/habitat) account for millions more. Climate change also affects food sources and habitat contributing to population decline.'
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