Blue Mud Dauber Wasp

The Blue Mud Dauber Wasp (Chalybion californicum) is native to North America, but an introduced species here in Hawaii. Its main claim to fame is that it’s renowned as a predator of Black Widow spiders!

11 thoughts on “Blue Mud Dauber Wasp”

kzmcb September 12, 2025 at 6:55 pm

Well, I suppose someone’s got to do it.

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Graham Post authorSeptember 12, 2025 at 6:59 pm

Otherwise we’d be overrun with Black Widow spiders. Cue the ominous music!

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1. kzmcb September 12, 2025 at 7:01 pm
  
  And token flash of lightning.
  
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bushboy September 11, 2025 at 9:09 pm

Certainly makes the Mud Daubers here look plain

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Graham Post authorSeptember 12, 2025 at 7:02 pm

We have the black ones too, but there are quite a few different iridescent wasps.

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1. bushboy September 12, 2025 at 7:13 pm
  
  There are a few in Australia but not many iridescent ones here. The Neon Cuckoo bee id one of the best but hard to get a photo
  
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  1. Graham Post authorSeptember 12, 2025 at 7:46 pm
    
    There are some colorful Cuckoo Wasps here.
    
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