Declining bird numbers point to problems for us all

Canaries in mines signaled hazards

Rob Butler, a renowned authority on B.C. birds, is concerned by a troubling downward trend in avian populations worldwide according to the Vancouver Sun.

Population surveys over the past 20 years on the south coast show that olive-sided flycatchers are down 75 per cent, common nighthawks 72 per cent, barn swallows 80 per cent and red-eyed vireos 85 per cent. The list goes on.

Whatever the reason — global warming, habitat loss or other factors — the declines could be part of a much bigger picture.

Outdoor enthusiasts can find more at two new Vancouver Sun blogs:

Related: Decline in global bird populations points to an unhealthy planet

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