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VIEW PRODUCT »Western Yellowjacket (Vespula pensylvanica)
This species is known for massive colonies that can reach 1000 to 5000 workers at peak size.
Geographic Region
Western yellowjackets are native to the western half of North America.
Natural Habitat
The majority of Western yellowjacket nests are found in abandoned rodent burrows, but have also been found in attics and building walls.
Weather Conditions
In warmer climates, entire colonies of Western yellowjackets can overwinter -- not just the queen.
Behavior
Western yellowjackets will scavenge for protein and sugar, becoming “picnic pests”. This species is known to create severe problems for loggers and fruit growers, as well as those engaging in outdoor recreational activities.
Unique Characteristics
Western yellowjackets share the same basic yellow and black pattern as other yellowjackets; however, sometimes they can be differentiated by a continuous yellow ring (called an “eye-loop”) around each eye.