The birds who only make little trips about the country, never staying long in one place, we call visitors.
"Birds may be divided according to their journeys into three groups, which will help you to place them: "1.

Citizens.
"Those Bird People whose families stay in or near the same place the year round, roving about somewhat according to the food-supply and weather.
"2.

Summer Citizens.
"The families that, though they are with us but six or eight months of the year, make their homes here, and pay their rent and taxes by working for the common good.

As they are almost all insect-eaters, they are even more useful than the stay-at-home Citizens, who are chiefly seed-eaters or cannibals.
"3.

Winter Visitors.
"The birds who come down from the North in severe weather, but do not stay in one place for any particular time, arriving one day and disappearing the next.