Pine Siskins, Redpolls, and Evening Grosbeaks are unusual northern finches which might frequent your feeder. Near the end of the season, feeder birds might become restless. As the days get longer, the beginning of breeding season is in sight. Shifts in bird population take place at this time. The Tufted Titmouse and the Downy Woodpecker, permanent residents of most areas, will stay through the season.
New birds appear daily as they migrate north, especially the sparrows.
This is the time when sparrow migration is in full swing. There is an increase in nest building during these spring months, and the provision of nesting materials will persuade more birds to nest in your vicinity. Warblers, vireos, flycatchers, orioles, and tanagers migrate North. Most of these insect-eating birds will not visit your feeder, but they will eat the caterpillars and insects in your yard. If trees and shrubbery are mature enough, some might stay to nest.