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January 7th, 2009
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The Atlas of the Breeding Birds of Ontario
On Monday night I reported to the club that there had been an
interesting article about The Atlas of the Breeding Birds of Ontario.
It appeared in The Toronto Star, January 20. These are a few of the
points made in the article.
Grassland birds seem to be the most threatened. This is probably
because of urbanization, the space taken by new or expanded roads and
the mysterious reduction of flying insects which may in part be due to
climate change. To compound the problem, less natural habitat will
survive if more corn is produced for ethanol. Nighthawks,
whippoorwill, chimney swift and six types of swallows have declined in
number from 30 to 50 percent over the past twenty years. Large raptors
are expanding due to the ban of DDT in the 1970s which has resulted in
a "purification" of the aquatic food chain. Bald Eagles have increased
400 percent, even more so in the south. Ontario's most populous
species is the Magnolia warbler with 15 million birds. It breeds in
the boreal forest to the north and the Hudson Bay Lowland thus being
less apparent to we in cottage country. Eight of the most populous
birds breed in the north while 10 million robins and the ubiquitous
red-eyed vireo live mostly in the south.
Top Ten Birds on the rise:
Canada goose
House finch
Blue-headed vireo
Turkey vulture
Wild turkey
Merlin
Eastern bluebird
Pine warbler
Bald eagle
Sandhill crane
Top Ten Birds in decline:
Common nighthawk
Chimney swift
Blue-winged teal
Red-headed woodpecker
Barn swallow
Cliff swallow
Brown-headed cowbird
Spotted sandpiper
Killdeer
Brian Markle KFN member
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