RHoman's picture

Speckled Wood chrysalis

Observed: 29th December 2010 By: RHomanRHoman’s reputation in InvertebratesRHoman’s reputation in InvertebratesRHoman’s reputation in InvertebratesRHoman’s reputation in InvertebratesRHoman’s reputation in Invertebrates

Found attached to a dead oak leaf in my local park

Species interactions

No interactions present.

Species with which Speckled Wood (Pararge aegeria) interacts


Fenwickfield's picture


Very well spotted I have searched and never find anything.


Martin Harvey's picture

pupation site

I found a Speckled Wood pupa some distance up a tree trunk last year, what height was this one? According to the books they normally pupate in low vegetation, and the thought did cross my mind that perhaps these ones that are high up and more exposed have been parasitised - some parasites affect the behaviour of their hosts making them do unexpected things. Haven't found anything to back this up though, just speculation on my part.

Entomologist and biological recorder

rimo's picture

Most of the wild ones I've

Most of the wild ones I've found have been fairly low down, although I did find one 6 feet up in the roof of a greenhouse which emerged without problems. When I've bred them most pupate on the foodplant, but a few did go up to the roof of the cage and pupate there, about a foot above the foodplant.

I think most of the pathogens/parasites which make their hosts climb up high, etc, tend to do so in order that the host die there, either of infection or by predation, etc, in order that the parasite/pathogen is transferred or otherwise spread. For example, the entomopthoriales group of fungi make their host climb vegetation in order to rain spores down on those below, or the wireworm parasite makes its host throw itself into water in order that the parasite can escape into its next host. While parasitised caterpillars, etc are often dopey and slow, it's presumably not in the parasitoid's best interest to have the host eaten while it is still trapped inside!

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RHoman's picture


The pupa was about 6 feet from the ground. I couldn't decide if it had snagged on the leaf/twig in the picture or was purposely attached. It is no longer in situ - perhaps blown off by very string winds?

Robert Homan