This species is a yellow jacket wasp, not a true hornet. Colonies contain 400 to 700 workers. It builds a characteristic large hanging paper nest up to (23 in) in length. Workers aggressively defend their nest by repeatedly stinging invaders. Nests are layered hexagonal combs covered by a mottled gray paper envelope. Bald-Faced Hornets create this paper envelope by collecting and chewing naturally occurring fibers. The wood fiber mixes with their saliva to become a pulpy substance that they can then form into place. Bald-faced hornets are omnivorous, and are considered to be beneficial due to their predation of flies, caterpillars, and spiders. However, their aggressively defensive nature makes them a threat to humans who wander too close to a nest or when a nest is constructed too close to human habitation. They vigorously defend the nest, with workers stinging repeatedly, as is common among social bees and wasps. However, the baldfaced hornet has a unique defense in that it can squirt venom from the stinger into the eyes of nest intruders. The venom causes immediate watering of the eyes and temporary blindness.
Providing nuisance animal trapping and removal services in the greater Chicago, Illinois (IL) region, including the cities of Joliet, Naperville, Lockport Illinois, Mokena, Bolingbrook, Cicero, Crete, Des Plaines, Evanston, Summit, Homer Glen, Mount Prospect, Oak Lawn, Oak Park, Orland Park, Palatine, Elwood, Crestwood, Oak Forest, and more. I service all of Cook County and Will County Illinois Wildlife calls, including the cities and villages of Downtown Chicago, Berwyn, Blue Island, Burbank, Beverly, Calumet City, Chicago Heights, Country Club Hills, Countryside, Des Plaines, Harvey, Hickory Hills, Hometown, Markham, Woodridge, Oak Forest, Palos Heights, Palos Hills, Park Ridge, Prospect Heights, Burr Ridge, Town of Cicero, Villages of Alsip, New Lenox, Barrington, Barrington Hills, Bedford Park, Bellwood, Bensenville, Berkeley, Bridgeview, Plainfield Broadview, Steger, Brookfield, Buffalo Grove, Burnham, Burr Ridge, Calumet Park, Chicago Ridge, Crestwood, Deer Park, Deerfield, Dixmoor, Dolton, East Dundee, East Hazel Crest, Evergreen Park, Flossmoor, Ford Heights, Forest Park, Forest View, Frankfort Illinois, Frankfort Square, Green Gardens, Franklin Park, Glencoe, Glenview, Glenwood, Golf, Hanover Park, Harwood Heights, Hazel Crest, Hillside, Hinsdale, Hodgkins, Aurora, Hoffman Estates, Homewood, Indian Head Park, Matteson, Justice, Kenilworth, La Grange, La Grange Park, Lansing, Lemont, Lincolnwood, Lynwood, Lyons, Maywood, McCook, Merrionette Park, Midlothian, Morton Grove, Mount Prospect, Niles, Norridge, North Riverside, Northbrook, Northfield, Oak Brook, Oak Lawn, Oak Park, Olympia Fields, Orland Hills, Orland Park, Palatine, Palos Park, Park Forest, Posen, Richton Park, River Forest, River Grove, Riverdale, Riverside, Robbins, Roselle, Rosemont, Sauk Village, Schaumburg, Schiller Park, Skokie, South Barrington, South Chicago Heights, South Holland, Steger, Stickney, Stone Park, Streamwood, Summit, Thornton, Tinley Park, University Park, Western Springs, Wheeling, Willow Springs, Woodridge, Worth, and more.