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Cuckoo Wasp Links

Previous Sightings by Tclenche

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Thumbnail ImageAmerican Goldfinch (Carduelis tristis) on May 10, 2015
Thumbnail ImageBald Eagle (Haliaeetus leucocephalus) on April 25, 2014
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Contributors » Tclenche » Cuckoo Wasp

Cuckoo Wasp discovered by Tclenche (#7279)

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Sighting Info

Observed: August 30, 2015 @ 4:45 PM
Posted on: August 30, 2015 @ 10:31 PM (diff: 0 days)
this bright blue and green flying insect was flying point to point around my patio, then landing and walking around. it stopped to inspect a nail hole in my patio rail. a little over 10 mm long i judge.

Sighting's Identification

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Newfoundland Nature

Newfoundland Nature

Comments by Site Members (scroll to post comment)

By Barry Hicks on 8/30/2015 11:24:11 PM


This is a cuckoo wasp (Family Chrysidae, Genus Chrysis).  These wasps basically seal the provisions that other wasps make.  In this case the wasp was probably shouting out the hole as it is probably being used by a sphecid wasp.  The sphecid catches and paralyses caterpillars and stuffs them into the hole and lays an egg on it.  While the sphecid is off catching additional prey, the cuckoo will go into the hole and lay its own egg.  When the hole is sealed up, the cuckoo wasp larva kills the other wasp larvae and feeds on the provisions.  Its a pretty interesting life history.  I do not have that particular species in my collection and would love to get a specimen of it.  If that is possible or if you have any other questions, send me an email at

By Tclenche on 8/31/2015 12:41:45 PM

Thank you Barry for that information. I had never seen this species before and consider myself lucky to have been able to photograph it.

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