How many birds do we have?

How many birds could you possibly see in Northwestern Ontario? Well, it takes quite a bit of looking to find a sensible answer to this question but here goes my estimate.
According to “Birds of Canada” (Godfrey), about 518 species of birds have been seen in Canada. This includes a few that have been found only once or twice but have been properly identified.
Many of these birds are rare, and some are native only to British Columbia and the Rockies so they could be dropped. By using some intelligent guesswork, we might arrive at a figure of about 425 birds found in the eastern half of North America.
The purely sea birds–gannets, puffins, many gulls, and terns–would never be found 2,000 miles from the Atlantic so they could be eliminated. Then there are others which appear only once in a while in the very southern part of the province and would never wander this far north.
Another deduction.
If we take in all of Northwestern Ontario from Rainy River to Sault Ste. Marie, we probably could find 190-200 birds which nest here. Some may be at the very edge of their range but nevertheless, this is considered to be a part of their normal nesting area.
In addition to these birds, we are fortunate to be on one of the branches of the Mississippi flyway so a lot of the birds which nest to the north of us pass through here each spring and fall.
Lots of sparrows, warblers, ducks, geese, and wading birds do this. My guess is about 35 or so.
Also, from time to time, wanderers appear–the Snowy Owl, Snow Buntings, and so on. Add perhaps another 10 species.
At both the eastern and western ends of Lake Superior, we have a very happy combination of habitats. The northern forest is all around us, and has its special residents. Meanwhile, the hardwood forest overlaps a bit at the very south parts of the area.
Our large amounts of water provide for another large group. Open farm area does, too. In fact, some western birds have been moving into the Rainy River/Kenora area from Manitoba.
Out of 42 species of wood warblers in Canada, we could find about 25. And out of the 56 sparrow-type birds, we have around 30.
We also have some species which are becoming fairly rare and endangered–the Bald Eagle and the Osprey, for example. The White Pelican, which used to nest only in Lake of the Woods, now has extended its range to at least as far as Rainy Lake.
We have lots of ducks and geese, both resident and migrant. But out of a Canadian population of 33 gull species, we would have only three or four.
So my estimate, for what it’s worth, is that there are about 250 species which you could see in Northwestern Ontario. But even if you are a most dedicated bird-watcher, and have lots of time, it will keep you going for a good many years to find them all.

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