What groups of birds are distinguished in relation to the occupied territory and migrations?

There are three groups of birds in relation to the occupied territory and migrations in different seasons of the year: sedentary, nomadic and migratory. Sedentary birds live constantly in the same places throughout the year (tits, sparrows, crows). Wandering birds move over short distances: by winter they migrate to the south, and in spring – in the opposite direction (waxwing, crossbill, snowy owl). Migratory birds arrive annually in the spring for breeding, covering distances of hundreds and thousands of kilometers. In late summer and autumn, they return to the southern regions for feeding (stork, swallow, cuckoo, swifts, geese). Such movements allow birds to survive and reproduce.