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Evergreen Bagworm Case - Thyridopteryx ephemeraeformis Bagworms are not really worms, but are caterpillars - they are the immature stage of a moth. They&#039;re called &quot;bagworms&quot; because they construct bags/cases that are covered with pieces of twigs and/or leaves.  This case had a big hole in the top, and I&#039;m not sure if it was made by a caterpillar/moth or parasitoid.<br />
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In this species, the larvae emerge from the carcass of their mother in her pupal case. These newborn larva emerge from the bottom of the hanging case and drop down on a strand of silk. The wind will then blow them to a nearby plant where they can build their own cases made of silk, fecal material, and plant bits. Adult males transform into moths in about four weeks and immediately seek out females for mating. The females never leave the cocoon, but wait for a male to stick its abdomen through the opening at the end of her case so they can mate. Females do not have eyes, legs, wings, or antennae...and, they can&#039;t eat. After her death, her offspring hatch and then pass through her body and leave the case.  Evergreen bagworm,Fall,Geotagged,Thyridopteryx,Thyridopteryx ephemeraeformis,United States,bagworm moth Click/tap to enlarge Promoted

Evergreen Bagworm Case - Thyridopteryx ephemeraeformis

Bagworms are not really worms, but are caterpillars - they are the immature stage of a moth. They're called "bagworms" because they construct bags/cases that are covered with pieces of twigs and/or leaves. This case had a big hole in the top, and I'm not sure if it was made by a caterpillar/moth or parasitoid.

In this species, the larvae emerge from the carcass of their mother in her pupal case. These newborn larva emerge from the bottom of the hanging case and drop down on a strand of silk. The wind will then blow them to a nearby plant where they can build their own cases made of silk, fecal material, and plant bits. Adult males transform into moths in about four weeks and immediately seek out females for mating. The females never leave the cocoon, but wait for a male to stick its abdomen through the opening at the end of her case so they can mate. Females do not have eyes, legs, wings, or antennae...and, they can't eat. After her death, her offspring hatch and then pass through her body and leave the case.

    comments (4)

  1. Love the shot and the list to accompany it, it's getting quite some substance! Posted one month ago
    1. Thanks Ferdy! I recently found at least 36 of these bagworm cases on a shrub on the side of a road in an urban area (I counted them while our car was stopped). I asked Dave to stop the car so I could get out and collect some, and he said no way, lol. Posted 29 days ago
      1. Looks like it is on a juniper species. Posted 29 days ago
        1. Oh, thanks for the tip, Gary. My shrub/tree ID skills are fairly pathetic. Posted 29 days ago

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The evergreen bagworm , commonly known as bagworm,
eastern bagworm, common bagworm, common basket worm, or North American bagworm, is a moth that spins its cocoon in its larval life, decorating it with bits of plant material from the trees on which it feeds.

The evergreen bagworm's case grows to a length of over 6 cm, tapered and open on both ends. Newborn larva are blackish and turn brown to tan as they grow, mottled with black. The heads and thorax develop a yellow tint as they.. more

Similar species: Moths And Butterflies
Species identified by Christine Young
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By Christine Young

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Uploaded Mar 19, 2019. Captured Nov 19, 2018 13:44 in 5 East St, New Milford, CT 06776, USA.
  • Canon EOS 80D
  • f/3.2
  • 1/166s
  • ISO100
  • 100mm