Barn Swallow Bugs

These are barn swallow bugs, Oeciacus vicarius.  Collected in Bear Valley, Alpine County, California. 23 April 2018.  AKA swallow bugs, cliff swallow bugs.

Swallow bugs are very similar to bedbugs, but have a few distinguishing characteristics:

  1. Small size. These specimens were about 3 mm long.
  2. Long hairs; hair length longer than width of eyes.
  3. The fourth (terminal) antennal segment is about the same length as the third antennal segment.

In this case, they were found in an upper loft area. Hopefully we will get more information on what birds are nesting on the structure.

For detailed biology, see The life history and ecology of the cliff swallow bug, Oeciacus vicarius.

 

Barn swallow bug, highlighting some distinctive features. Note too that this insect is small, at about 3 millimeters long. We created this detail from one of the images below.
Barn swallow bug, highlighting some distinctive features. Note too that this insect is small, at about 3 millimeters long. We created this detail from one of the images below.

 

arn swallow bugs next to a ruler. Those are millimeter lines, so these bugs are about 3 mm long.
Barn swallow bugs next to a ruler. Those are millimeter lines, so these bugs are about 3 mm long.
Note how long the hairs are.
Note how long the hairs are.

 

 

 

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