Insectivorous birds are birds that feed primarily on insects. FLYCATCHER is a type of insectivorous bird that typically catches its prey in mid-air. Vireo is another type of insectivorous bird that feeds mainly on insects and other small invertebrates. Both flycatchers and vireos are found in a variety of habitats, including forests, grasslands, and wetlands. They are important predators in their respective ecosystems, helping to control insect populations.