The Niagara, Canada West Mail, of the 19th ult. states A tremendous emigration of pigeons from the adjoining states took place on Sunday inst. They were crossing the Niagara from before nine o'clock in the morning until past one in the afternoon, and taking the speed flight at forty miles an hour, the flock must have been upwards of one hundred and twenty miles in length.May 4, 1847. Flocks of pigeons. Middlebury Northern Galaxy 12(1): 2.