Do Caddisflies have a bad odor?

Subject:  Identify Bug Please
Geographic location of the bug:  Keene, NH USA
Date: 11/06/2019
Time: 04:13 PM EDT
Your letter to the bugman:  All I know is it gives off an awfule scent. What kind of bug is it and where is the scent coming from?
How you want your letter signed:  Frank F


Dear Frank,
This is a Caddisfly, an insect with an aquatic nymph, so Caddisflies are generally found near a source of water.  We cannot ever recall any scent when we have encountered Caddisflies, nor can we recall reading about strong smells associated with Caddisflies, so we tried to research the matter.  There is no mention of an odor emanating from the insects in the Central Arizona Project page on Caddisflies nor is there a mention of an odor on the Encyclopaedia Britannica page.

2 thoughts on “Do Caddisflies have a bad odor?”

  1. I think they do:

    On page 686 here:
    “The primary food source is leaf litter detritus. Males of many species have modified antennal scapes with scent scales or scent glands, eversible glands on the face, or mask-like maxillary palps,
    or a combination of these.”


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