Black-capped Vireos arrive in Texas from mid-March to mid-April (Campbell, 1995), while vireos in Oklahoma arrive there approximately ten days later. A pair will most often be monogamous for the breeding season, selecting a nest site together. The female completes in the nest, usually requiring 2 to 3 days to do so (Campbell, 1995). Black-capped Vireos suspend their nests in the forks of shrubs in dense underbrush, from 1’ to 6’ above the ground; most nests are found at "doorknob height." Three to four eggs are laid in the first nesting attempt, the first being laid the first day that the nest is completed, the subsequent eggs being laid one a day. Incubation takes 14 to 17 days, and is shared by both the male and female (Campbell, 1995). Vireo chicks are fed by both adults as well, and leave the nest 10 to 12 days after hatching (Campbell, 1995).