[b_sharp]

Anyone doubting the number of birds around needs to visit central Canada during the yearly migrations. I've seen 'clouds' which have been estimated to contain ~100,000 Snow and Canadian geese.

[grey_whiskers]

Anyone doubting the number of birds around needs to visit central Canada during the yearly migrations. I've seen 'clouds' which have been estimated to contain ~100,000 Snow and Canadian geese.

I remember from an elementary school primer that in the mid-1800's there were individual flocks of passenger pigeons esimated at two *billion* birds.

But they are extinct.

Full Disclosure: What would big cities today look like if they weren't extinct?

Cheers!