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casemoth (case)

Cryptothelea fuscescens


An exquisite "log-cabin" case of a New Guinea case moth (bagworm moth), family Psychidae.


Spotted on Bougainvillea sp. in a large semi-urban yard & garden adjacent to a disturbed patch of remnant forest.


The execution and style of this "house" represents the most precisely built larval cocoon, bag (as in bagworm) or in this case, "case", I've ever encountered in person or imagery. This structure was motionless over several days of casual observation. Similar constructions can be seen here here or here indicating that this or a closely related species occurs in Singapore as well. There is seemingly even a relative from Kenya

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Scott Frazier
Scott Frazier 7 years ago

Yes, I agree Mark!

Mark Ridgway
Mark Ridgway 7 years ago

Incredible structure.

Scott Frazier
Scott Frazier 11 years ago

"The Psychidae are a group of small to medium-sized moths that are members of the Superfamily Tineiodea. Female adults of most species lack wings or have very small and non-functional wings. Males are typically black and their wingspan is 1.2-3.6 cm. The abdomen of these moths is long and tapering. Adults of both sexes have vestigal mouth parts. In some species, females entirely lack eyes, antennae, and legs. Larvae form characteristic spindle-shaped silken cases covered with bits of leaves, twigs, and other debris. Each larva enlarges its case as it grows. These moths pupate in the larval case after it is attached to a twig with silk. In most species, the female does not leave the case, but attracts males by emitting pheromones from her abdomen. To mate, the male thrusts his abdomen through the open lower end of the case. The female lays her eggs in the case; when they hatch, larvae crawl away to feed and form their own silken cases."

Ashish Nimkar
Ashish Nimkar 11 years ago

Scott Moth is not Case baring. Just Caterpillar or Larvae stage is case baring as per my understanding.. Its say Bagworm better way...

Scott Frazier
Scott Frazier 11 years ago


JungleLoveMamasita 12 years ago

Okay this is why I just love this community! i would go my entire life not knowing that this living creature existed in nature, OMG! I am speechless!

BonzPondriiztour 12 years ago

Wow How it made that hut

Atul 12 years ago

this is so well done a nest great work

Scott Frazier
Scott Frazier 12 years ago


iamcherreymaiya 12 years ago

wow! nature's carpenters!

Ashish Nimkar
Ashish Nimkar 12 years ago

I think shrubs mostly from Mimosaceae family..which are heavy prickled on trunk and branches.

Ashish Nimkar
Ashish Nimkar 12 years ago

In Tasmania there must be long prickled shrubs where these insects find easily light weight sticks to make such Pupa.

lori.tas 12 years ago

We get some terrestrial caddis fly larvae here in Tasmania that look a bit like that. I'll have to find some photos and post them.

marylou.wildlife 12 years ago

Wow, that is incredible!! These findings are a nice reminder of how intricate and ingenious nature can be... thanks for sharing this!

Scott Frazier
Scott Frazier 12 years ago

Thanks everyone!

Dangermouse 12 years ago

Brilliant shot, interesting to read what it is as well. Thanks for sharing!

Ashish Nimkar
Ashish Nimkar 12 years ago

Thanks to you actually... You remind me a forgotten spotting.. Just posted...!!

Scott Frazier
Scott Frazier 12 years ago

Yes of course, the structure (cocoon, bag, etc) houses the pupa. Thanks for the links.

Ashish Nimkar
Ashish Nimkar 12 years ago

Such called Bagworm.

Ashish Nimkar
Ashish Nimkar 12 years ago

Its moth Pupa.

auntnance123 12 years ago

That is perfectly cool! Insects are the best.

Scott Frazier
Spotted by
Scott Frazier

Papua, Indonesia

Spotted on Aug 16, 2011
Submitted on Aug 16, 2011

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