DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Chrysalis infected with parasitic larvae. Chrysalis of the small tortoiseshell butterfly (Aglais urticae) with a thin thread extending from it. This silken thread was used by a maggot of the parasitic fly Sturmia bella to leave its host.
Model release not available. Property release not required.