May 23, 2017 – Bell’s Vireo (Vireo bellii)
Requested by: Marjorie “Slim” Woodruff
These vireos are found in parts of the central and southwestern United States, through much of Mexico and into parts of western Central America. They eat insects and spiders, picking them from foliage, occasionally while hovering. Their hanging bag-shaped nests are built from grass, stems, plant fibers, skelotonized leaves, paper, bark strips, spider silk, and spider egg cases, suspended from forked branches. Both parents build the nests and incubate the eggs. Pairs with unsuccessful nests may try again, sometimes making as many as seven attempts in a season. They are classified as Near Threatened by the IUCN due to habitat loss and brood parasitism by the Brown-Headed Cowbird.