The other species were introduced in the late 1800's and 1900's. Although their distribution is closely related to horticultural outlets, especially near larger urban areas, where used as ornamentals, rural infestations are common when the species are used to improve wildlife habitat. Some older, localized outbreaks in southern and central Illinois have been noted. Although not recorded officially from that many counties, bush honeysuckles are probably now found in most Illinois counties. Habitat Bush honeysuckles have a broad tolerance to a variety of moisture regimes and habitats.
Most natural communities are susceptible to invasion by one or more of the species.
Often the source of the invasion comes from a planting or from a highly disturbed successional community in which the honeysuckle has flourished. Wetlands, prairie, and forested communities are all affected. Habitat disturbance appears to be a key to introduction of these species. The spread of bush honeysuckle is generally accomplished by birds. Fruits are consumed readily upon ripening during summer.