![]() The insects are largely dormant during the period between the time nests are abandoned in summer and just prior to the return of swallows the following spring. Swallow bug bites of humans tend to occur in late winter and spring, when the swallow bugs emerge from winter dormancy in anticipation of the return of their swallow hosts. Problems with human bites occur in homes where swallows attached and maintained nests during the previous summer. The swallow bug is a parasite of cliff swallows and, less commonly, barn swallows. However, in the absence of the bat hosts, these insects cannot sustain and reproduce. Bat bugs may move into human living areas and incidentally bite people, with such migrations particularly common when bats migrate or are eliminated from the building. ![]() Bat bugs develop in colonies of roosting bats, which sometimes occur in attics or behind walls of buildings. Prior to the recent increase of bed bugs, the bat bug was the most common representative of this group of insects found within homes in Colorado. Bed bugs can be accidentally carried on furniture, luggage and other materials so problems with bed bugs tend to be most severe in apartments, motels and other sites that see high amounts of human traffic.īat bug (Cimex pilosellus). However, within the past decade it has had tremendous resurgence. For several decades following World War II it was largely eradicated form the United States, existing in only small pockets. The bed bug is a notorious species and is the only member of this insect family in Colorado that is adapted to living entirely with humans. ![]() Five of the cimicid bugs are presentīed bug (Cimex lectularius). The bed bug, bat bug and related species of the family Cimicidae, are blood sucking insects that feed on birds and/or mammals. Figure 3 (above): Bed bug during course of 12-minute feeding.
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