Subject: Pink Glow Work
Location: Lake Lopez, California
May 11, 2015 1:34 pm
We found this worm at Lake Lopez this weekend on an Oak Tree. Very fascinating!
Signature: DiAnn

Pink Glowworm

Female Pink Glowworm

Dear DiAnn,
We believe your female Pink Glowworm (actually a Firefly) is
Microphotus angustus, which is pictured on BugGuide, though there is a dearth of information on the site.  Luckily our favorite text for local species in our area, The Insects of the Los Angeles Basin by Charles L. Hogue, provides a wealth of information:  “the female of the Pink glowworm (which is 1/2 in.,or 13 mm, long) communicates her location to the male (1/4 in., or 6 mm, long) by emitting a continuous uniform luminescent glow.  The adult male has the usual firefly beetle form, but the female is ‘larviform’ (wingless and elongate like the larva …).  The males are not seen as often as the females because they give light only when disturbed, and the light is weak and not used in communication.  The female is fairly common in late spring to early summer in the foothill canyons  … .  Found at night by its glow and in the daytime under stones lying on the leaf mold in grassy areas, the adult Pink Glowworm is easily recognized by the pink color of the flattened segments;  the terminal segments are yellowish.  The segments of the larvae of both male and female are blackish with pink margins.”  We are very excited to include and to feature your Pink Glowworm documentation.

Location: Lake Lopez, California

3 Responses to Female Pink Glowworm

  1. Robin says:

    The top of the page says Pink Glow Work instead of worm.

    • bugman says:

      Thanks. Our editorial staff works diligently to ensure accuracy in our spelling and grammar as well as the content of our responses, but we do not correct grammatical errors or spelling errors in the written submissions we receive. If our querents do not care enough about running spell check and grammar check on their questions, we respect that prerogative.

  2. Maury Feskanich says:

    I just found one of these in my yard in the Santa Cruz mountains, in Cupertino CA. Didn’t know lightning bugs were even in the state, let alone in the Bay Area.

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